Research Article

Diagnostic Yield of Echocardiography in Syncope Patients with Normal ECG

Table 1

Definitions of abnormal ECG and echo.

Abnormal ECGAbnormal echo

(i) Arrhythmias
(ii) Q waves
(iii) Ischemic changes
(iv) 2nd- and 3rd-degree AV block
(v) Paced rhythm
(vi) QTc > 500 ms
(vii) Left bundle branch block
(viii) Bifascicular block
(ix) Brugada pattern
(x) Abnormal axis
(i) LVEF < 45%
(ii) Moderate-severe valvular abnormalities (stenosis or regurgitation)
(iii) Severe ventricular wall hypertrophy
(iv) Any septal wall motion abnormality
(v) Hypertrophic cardiomyopathy with outflow tract obstruction
(vi) Severe pulmonary hypertension
(vii) Hemodynamically significant pericardial effusions

AV, atrioventricular. LVEF, left ventricular ejection fraction.