Diagnostic Yield of Echocardiography in Syncope Patients with Normal ECG

Table 1

Definitions of abnormal ECG and echo.

Abnormal ECG	Abnormal 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.