Table 2.

Findings at cardiac examination of the patients with the 3243A>G mutation.

	Patients (n)
ECG
Normal	22
LVH	9
Conduction disturbances	5
Other*	9
Echocardiography
Normal	16
LVH	19
LVSD or LVDD	9
Valvular disorders	6
Holter-recordings
Normal	14
Benign extrasystoles†	15
VES >30/h	1
SVT/AF attacks	4
NSVT	1
Conduction disturbances‡	4

LVH, left ventricular hypertrophy; LVSD, left ventricular systolic dysfunction; LVDD, left ventricular diastolic dysfunction; VES, ventricular extrasystoles; SVT, supraventricular tachycardia; AF, atrial fibrillation; NSVT, non-sustained ventricular tachycardia. LVSD was diagnosed if ejection fraction < 50%. LVDD was diagnosed if E/A-ratio < 1. ^*Other ECG findings include: Q-wave abnormalities, 2; ST/T-wave abnormalities, 4; sinustachycardia, 2; prolonged QTc, 1.^†Supraventricular extrasystoles or VES <30/h. ^‡Conduction disturbances include: Mobitz II AV-block, 1; intermittent delta wave, 1; sinus arrests (2.4–2.8 s), 2.