1. Changes in Follow-Up ECG and Signal-Averaged ECG in Patients with Arrhythmogenic Right Ventricular Cardiomyopathy.
- Author
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BAE, MYUNG HWAN, KIM, JAE HEE, JANG, SE YONG, PARK, SUN HEE, LEE, JANG HOON, YANG, DONG HEON, PARK, HUN SIK, CHO, YONGKEUN, and CHAE, SHUNG CHULL
- Subjects
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HEART abnormality diagnosis , *CHI-squared test , *ELECTROCARDIOGRAPHY , *HEART abnormalities , *LONGITUDINAL method , *MATHEMATICAL statistics , *RESEARCH funding , *T-test (Statistics) , *PARAMETERS (Statistics) , *INTER-observer reliability , *DISEASE progression , *DATA analysis software , *DESCRIPTIVE statistics - Abstract
Background Electrocardiogram (ECG) and signal-averaged ECG (SAECG) are important as diagnostic tools in arrhythmogenic right ventricular cardiomyopathy (ARVC). The aim of this study was to investigate changes in follow-up ECGs and SAECGs in patients with ARVC. Methods We collected 185 follow-up ECGs from 38 patients and 35 follow-up SAECGs from 18 patients during a mean follow-up period of 64 ± 36 months. Results On baseline ECG and SAECG, epsilon waves, T-wave inversion (TWI), and terminal activation delay (TAD) of QRS ≥55 ms in right precordial leads, and late potentials (LPs) were observed in six (16%), 11 (29%), 13 (34%), and 23 (68%) patients, respectively. During the follow-up period, 15 (39%) patients had 18 changes in ECG and/or SAECG features included in modified Task Force Criteria (TFC) of ARVC. Two patients developed new epsilon waves, and another two patients had dynamic epsilon waves. Newly developed TAD of QRS ≥55 ms was observed in two patients and disappeared in one patient. Eight patients, seven with and one without TWI in V1-V3 or beyond, showed dynamic changes. LP developed in three patients. One patient with dynamic change of TWI and another patient with dynamic change of epsilon wave and TAD of QRS ≥55 ms could not satisfy the modified TFC during follow-up. Conclusions Follow-up ECGs and SAECGs showed changes in 39% of patients with ARVC. Larger studies with a longer follow-up period are needed to investigate the clinical implications of changes in follow-up ECG and SAECG. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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