<unk>  is useful for finding structural heart disease in patients with<unk> -degree<unk>   block while symptoms suspected to be cardiac in origin including syncope, presyncope, lightheadedness.
First degree AV block echocardiography
Third degree AV block echocardiography
Second degree AV block echocardiography
Second degree AV block physical examination
First degree AV block physical examination
Right bundle branch block echocardiography
Ventricular tachycardia echocardiography
Third degree AV block CT scan