ecg electrocardiograph paper that shows normal sinus rhythm nsr with frequent pacs premature atrial contractions, pvcs premature

abnormal abnormality analysis arrest artery atherosclerosis atrial attack background beat cardiac cardiogram cardiology care chart contractions coronary diagnosis disease ecg ekg electrocardiogram electrocardiograph emergency frequent graph graphic health healthy heart hospital infarction ischemia ischemic lateral left medical medicine mycardial myocardial normal nsr pacs paper patient premature pulse pvcs rhythm shows sinus st-t stroke stt test thrombosis treatment vascular ventricular