Ratio of late to early T-wave peak amplitude in 24-h electrocardiographic recordings as indicator of symptom history in patients with long-QT Syndrome types 1 and 2.

doi:10.1016/j.jacc.2005.07.068

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Ratio of late to early T-wave peak amplitude in 24-h electrocardiographic recordings as indicator of symptom history in patients with long-QT Syndrome types 1 and 2.

Journal of the American College of Cardiology - 3 Jan 2006

Viitasalo Matti, Oikarinen Lasse, Swan Heikki, Glatter Kathryn A, Väänänen Heikki, Fodstad Heidi, Chiamvimonvat Nipavan, Kontula Kimmo, Toivonen Lauri, Scheinman Melvin M

Abstract excerpt

UNLABELLED: We reviewed 24-h electrocardiographic recordings from 214 genotyped subjects--97 with long-QT syndrome type 1 (LQT1), 62 with LQT2, and 55 unaffected--to record maximal diurnal amplitude ratios between late and early T-wave peaks. Maximal amplitude ratios between late and early T-wave peaks were higher in symptomatic than in asymptomatic patients both in LQT1 (3.2 +/- 1.0 vs. 2.3 +/- 0.8; p < 0.001)...

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Ratio of late to early T-wave peak amplitude in 24-h electrocardiographic recordings as indicator of symptom history in patients with long-QT Syndrome types 1 and 2.

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