On ECG,<unk>  heart disease is characterized by high frequency of low-voltage QRS complexes.
Carcinoid syndrome electrocardiogram
Coronary heart disease electrocardiogram
Carcinoid syndrome echocardiography or ultrasound
Carotid artery stenosis electrocardiogram
Chronic obstructive pulmonary disease electrocardiogram
Coronary angiography left coronary artery
The chest x-ray in cardiovascular disease
Sudden cardiac death electrocardiogram