Paradoxical Effects of Interatrial Conduction Delay. We present a unique case where early proarrhythmic and late antiarrhythmic characteristics of interatrial conduction delay were observed during the long-term progression of HCM. Occurrence of AT constantly increased as the interatrial conduction delay became more prominent, while the P-wave width in sinus rhythm and the AT cycle length both showed an instantaneous increase in parallel. As the interatrial delay reached a critical point, the right and left atrial P-wave became virtually separated, as demonstrated by the findings of ECGs and echocardiography. This phenomenon resulted in the complete cessation of tachycardias. (J Cardiovasc Electrophysiol, Vol. 22, pp. 587-589 May 2011)

atrial tachycardia, conduction, electrocardiography, hypertrophic cardiomyopathy
dx.doi.org/10.1111/j.1540-8167.2010.01893.x, hdl.handle.net/1765/34213
Journal of Cardiovascular Electrophysiology
Erasmus MC: University Medical Center Rotterdam

Bauernfeind, T, Caliskan, K.C, Vletter, W.B, ten Cate, F.J, Dabiri, L, de Groot, N.M.S, … Szili-Török, T. (2011). Paradoxical effects of interatrial conduction delay in a hypertrophic cardiomyopathy patient in the long-term: Time is a great healer. Journal of Cardiovascular Electrophysiology, 22(5), 587–589. doi:10.1111/j.1540-8167.2010.01893.x