<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><FONT class="Apple-style-span" face="Arial">Español</FONT><DIV><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Estimada Dra. Li:</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Ud. tiene razón en eso, pero otra posibilidad es que la prueba de onda T alternante (OTA) no sea tan buena para detectar problemas de repolarización en el VD como lo es en el VI (siendo el SBr predominantemente una canalopatía del VD). Además, tal vez la coordinación de la prueba OTA no fue la más apropiada tanto en los estudios alemanes como japoneses citados por el Dr. Brugada. ¿Por qué un paciente con ECG tipo I permanece asintomático de 5 a 10 años y luego muere súbitamente o tiene 3 episodios de síncope el mismo día? ¿La prueba OTA sería anormal en este paciente antes de experimentar MSC o síncope recurrente?</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Sólo estamos haciendo precalentamiento, hay un largo camino por delante. </FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Saludos cordiales, </FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Aldo Alberto Furlani MD</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Cardiac Electrophysiologist</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Consultant Cardiologist</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Heart Institute of the Caribbean</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Mandeville</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Jamaica</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><A href="mailto:afurlani@caribbeanheart.com">afurlani@caribbeanheart.com</A></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">www.caribbenheart.com</FONT></DIV><DIV><FONT class="Apple-style-span" face="Arial"><BR></FONT><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">--</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Dr.</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Sergio</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Dubner</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">President</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">of</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Scientific</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Committee</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 13px/normal Lucida Grande; min-height: 16px; "><FONT class="Apple-style-span" face="Arial" size="3"><SPAN class="Apple-style-span" style="font-size: 12px;"><BR style=""></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Dr.</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Edgardo</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Schapachnik</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">President</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">of</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Steering</FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN><FONT class="Apple-style-span" face="Arial">Committee</FONT></DIV><DIV><BR class="khtml-block-placeholder"></DIV></SPAN></DIV><DIV><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV> <DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Español - Portugués</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Español</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Entonces debemos preguntarnos por qué es así, Dr. Ramón Brugada. Sin una comprensión clara de la naturaleza de la enfermedad, podríamos permanecer siempre en la oscuridad, en términos de estratificación de riesgo. Si el síndrome de Brugada fuera un trastorno de repolarización primaria, uno esperaría inestabilidad de la repolarización, como la onda T alternante de microvoltaje antes del inicio de la TV/FV. De hecho, la mayoría de los pacientes con TV/FV muestran potenciales tardíos positivos (Arch Cardiol Mex. 2006 Jan-Mar;76(1):52-8). Recientemente el grupo del Dr. Shimizu demostró anormalidades de despolarización y repolarización [Pacing Clin Electrophysiol. 2006 Oct;29(10):1112-21]. En el pasado, nuestro enfoque principal fue la consecuencia de INa reducido en la repolarización de fase 1 en el epicardio del VD y la dispersión transmural de repolarización, que puede ser parte de la historia. La propagación lenta de activación en la región del TSVD por corriente de sodio reducida, no debería pasarse por alto (Am J Physiol Heart Circ Physiol. 2006 Jul 28; [Epub ahead of print]).</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Las canalopatías, especialmente las mutaciones SCN5A, pueden resultar en anormalidades estructurales, aunque muchas no son detectables por pruebas diagnósticas de rutina. Estas alteraciones estructurales (macroscópicas y microscópicas) también pueden ser el sustrato de taquiarritmias ventriculares reentrantes y muerte súbita por TV/FV. </FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Atentamente,</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Li Zhang, MD</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">LDS Hospital,</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">University of Utah School of Medicine</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Salt Lake City, UT</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">USA</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">---------------</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Portugués</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN class="Apple-style-span" style="line-height: 19px;"><SPAN class="Apple-style-span" style="font-size: 13.3px; line-height: normal;"><FONT class="Apple-style-span" face="Arial">Então nós poderíamos pergunatar a nós mesms por que sto Dr. Ramon Brugada. Sem um claro entendimento da natureza da doença nós podemos estar sempre no escuro em termos de estratificação. Se a síndrome de Brugada for uma doença primária da repolarização, alguns poderiam esperar instabilidade na repolarização tal como micro alternância da onda T prévia ao início da TV/FV. De fato, a maioria dos pacientes com TV/FV demonstram potenciais tardios positivos ( </FONT></SPAN><FONT class="Apple-style-span" color="#003FC3"><SPAN class="Apple-style-span" style="font-size: 13.3px; line-height: normal;"><FONT class="Apple-style-span" face="Arial">Arch Cardiol Mex.</FONT></SPAN></FONT><SPAN class="Apple-style-span" style="font-size: 13.3px; line-height: normal;"><FONT class="Apple-style-span" face="Arial"> 2006 Jan-Mar;76(1):52-8 ). Recentemente o grupo do Dr Shimizu demonstrou ambas alterações na despolarização e repolarização [ </FONT></SPAN><FONT class="Apple-style-span" color="#003FC3"><SPAN class="Apple-style-span" style="font-size: 13.3px; line-height: normal;"><FONT class="Apple-style-span" face="Arial">Pacing Clin Electrophysiol.</FONT></SPAN></FONT><SPAN class="Apple-style-span" style="font-size: 13.3px; line-height: normal;"><FONT class="Apple-style-span" face="Arial"> 2006 Oct;29(10):1112-21]. NO passado nosso principal foco foi a consequência da reduzida Ina na fase 1 de repolarização no epicárdio do VD e a dispersão transmural da repolarização, o que pode ser parte da história. A propagação lenta da ativação na região da VSVD devido a reduzida corrente de sódio por si só, naõ deve ser superestimada </FONT></SPAN><SPAN class="Apple-style-span" style="font-size: 10px; line-height: normal;"><FONT class="Apple-style-span" face="Arial">Am J Physiol</FONT></SPAN></SPAN><A href="http://209.200.10.92/cgi-bin/t50/ezlclk.fcgi?id=870"><SPAN class="Apple-style-span" style="line-height: 19px;"><FONT class="Apple-style-span" color="#79A672"><SPAN class="Apple-style-span" style="font-size: 12px; line-height: normal;"><FONT class="Apple-style-span" face="Arial"> </FONT></SPAN></FONT><FONT class="Apple-style-span" color="#79A672"><SPAN class="Apple-style-span" style="line-height: normal;"><FONT class="Apple-style-span" face="Arial">Heart </FONT></SPAN></FONT></SPAN></A><SPAN class="Apple-style-span" style="line-height: 19px;"><SPAN class="Apple-style-span" style="font-size: 10px; line-height: normal;"><FONT class="Apple-style-span" face="Arial">Circ Physiol. 2006 Jul 28; [Epub ahead of print] </FONT></SPAN><SPAN class="Apple-style-span" style="font-size: 13.3px; line-height: normal;"><FONT class="Apple-style-span" face="Arial">.</FONT></SPAN></SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">As canalopatias, especialmente mutações no SCN5A, podem lecar a anormalidades estruturais, embora muitas sejam indetectáveis pelos exames de rotina. Estas alterações estruturais (macroscópicas ou microscópicas) também podem ser o substrato para taquiarritmias ventriculares por reentrada e morte súbita por TV/FV. </FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Sinceramente,</FONT></DIV><P style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"> </FONT></P><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Li Zhang, MD</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">LDS Hospital,</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Escola de Medicina da Universidade de Utah</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Salt Lake City, UT</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">USA</FONT></DIV><FONT class="Apple-style-span" face="Arial"><BR></FONT><DIV><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><FONT class="Apple-style-span" face="Arial"><BR></FONT></DIV> <FONT class="Apple-style-span" face="Arial">Español - Portugués</FONT><DIV><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV><FONT class="Apple-style-span" face="Arial">Español</FONT></DIV><DIV><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">No que yo sepa. Hay dos estudios en los cuales se estudia la onda T alternante (Japón y Alemania) en el Síndrome de Brugada. Ninguno mostró correlación con el riesgo.</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 13px/normal Lucida Grande; min-height: 16px; "><FONT class="Apple-style-span" face="Arial" size="3"><SPAN class="Apple-style-span" style="font-size: 12px;"><BR></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Dr. Ramon Brugada MD FACC</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Associate Professor of Medicine</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Canadian Research Chair Genetics of Arrhythmias University of Montreal Director Clinical Cardiovascular Genetics Center Montreal Heart Institute 5000 Rue Belanger Montreal, QC H1T 1C8 Canada </FONT><A href="mailto:ramon@brugada.org"><FONT class="Apple-style-span" face="Arial">ramon@brugada.org</FONT></A></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">----------</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Portugués</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Não que eu saiba. Existem dois estudos que pesquisaram a alternância de onda T (Japão e Alemanha) na sindrome de Brugada. Nenhum dos dois demonstrou correlação com risco.</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; min-height: 14px; "><FONT class="Apple-style-span" face="Arial"><BR></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Dr. Ramon Brugada MD FACC</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Professor Associado de Medicina</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Cadeira de Pesquisa Genética de Arritmias Canadense</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Universidade de Montreal</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Diretor Clínico do Centro de Genética </FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Instituto do Coração de Montreal</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">5000 Rue Belanger</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Montreal, QC H1T 1C8</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Canada</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="mailto:ramon@brugada.org"><FONT class="Apple-style-span" face="Arial">ramon@brugada.org</FONT></A></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV><FONT class="Apple-style-span" face="Arial"><BR></FONT><DIV> <FONT class="Apple-style-span" face="Arial"><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "></SPAN></FONT></DIV><FONT class="Apple-style-span" face="Arial"><BR></FONT><DIV><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><FONT class="Apple-style-span" face="Arial"><BR></FONT></DIV><FONT class="Apple-style-span" face="Arial"> Español - Portugués</FONT><DIV><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV><FONT class="Apple-style-span" face="Arial">Español</FONT></DIV><DIV><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Estimado Dr. Ramón Brugada:</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Como Ud. ha argumentado en su respuesta a la pregunta sobre los pacientes asintomáticos con síndrome de Brugada, el uso del EEF para la estratificación de riesgo de los pacientes asintomáticos es muy polémico. El primer síntoma puede ser la muerte súbita en tales pacientes. En tal contexto, ¿hay algún papel para la onda T alternante de microvoltaje para la estratificación de riesgo y para decidir si existe la necesidad de CDI?</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; min-height: 14px; "><FONT class="Apple-style-span" face="Arial"><BR></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Dr. Sunil Roy. MD, DM</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Senior Lecturer in Cardiology</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Medical college, Calicut, Kerala, India</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Email: </FONT><A href="mailto:sunilroytn@calicutmedicalcollege.ac.in"><FONT class="Apple-style-span" face="Arial">sunilroytn@calicutmedicalcollege.ac.in</FONT></A></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">-----------------</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Portugués</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial"><BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Caro Dr. Ramon Brugada,</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Como você discutiu na sua resposta a questão do paciente assintomático com síndrome de Brugada, o uso do EEF para estratificar o risco num paciente assintomático é muito controverso. O primeiro sintoma pode ser a morte súbita em tais pacientes. Neste cenário existe algum lugar para a microalternância de onda T na estratificação de risco e na decisão da necessidade de CDI?</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><FONT class="Apple-style-span" face="Arial"> <BR class="khtml-block-placeholder"></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Dr. Sunil Roy. MD, DM</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Senior Lecturer em Cardiologia</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Colégio Medico, Calicut, Kerala, Índia</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial">Email: </FONT><A href="mailto:sunilroytn@calicutmedicalcollege.ac.in"><FONT class="Apple-style-span" face="Arial">sunilroytn@calicutmedicalcollege.ac.in</FONT></A></DIV></BLOCKQUOTE></DIV></DIV></BLOCKQUOTE></DIV><DIV><BR class="khtml-block-placeholder"></DIV><FONT class="Apple-style-span" face="Arial"></FONT></BLOCKQUOTE></DIV></DIV></BODY></HTML>