Atrioventricular block and hyperthyroidism - 11/10/14
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Resumen |
Hyperthyroidism is usually responsible for sinus tachycardia, but in very rare cases, it leads to serious severe heart complications including severe rhythmic troubles and/or heart insufficiency and/or coronary insufficiency. Association of hyperthyroidism with one or more severe heart complications is called cardiothyreosis. Cardiothyreosis frequency varies from country to country and according to hyperthyroidism's severity and personal history of heart disease. Among severe rhythmic troubles the most known are atrial fibrillation, atrial flutter and ventricular tachycardia. Complete atrioventricular block (CAVB) is considered as quite exceptional.
Our aim |
was to analyze its frequency within a large group of hyperthyroidisms and cardiothyreoses.
Results |
Among 2134 hyperthyroidisms (1680 women and 454 men), we noted 5 AVB=0.23%. Among 316 cardiothyreoses (246 W, 70 M) we observed 5 CAVB=1.5%. Curiously, CAVB are observed only in females. Among female with hyperthyroidism CAVB was observed in 5/1680=0.29%, but it accounts for 5/246 cardiothyreoses=2.03%.
Conclusion |
In this large series of hyperthyroidisms, CAVB is certainly rare, but should be systematically sought, especially in women before treating them with a beta-blocker.
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Vol 75 - N° 5-6
P. 509 - octobre 2014 Regresar al número
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Bienvenido a EM-consulte, la referencia de los profesionales de la salud.