Related by context. Frequent words. (Click for all words.) 75 EKG 63 ECG 62 echocardiogram 55 angiogram 55 irregular heartbeat 52 oxygen saturation 51 cardiac 51 arrhythmia 50 CT scan 50 CAT scan 49 defibrillator 49 cardiac catheterization 48 ultrasound 48 heartbeat 48 respiration 48 abnormality 48 MRI scan 47 irregular heartbeats 46 abnormal 46 coronary artery disease 46 biopsy 46 ischemic stroke 46 pacemaker 45 angina 45 palpitations 45 apnea 45 rapid heartbeat 45 MRI scans 45 brain scans 45 cardiac arrhythmia 45 systolic 45 blood glucose 45 sudden cardiac death 45 angiography 44 heartbeats 44 catheterization 44 abnormalities 44 blocked arteries 44 MRI 44 atrial fibrillation 44 arrhythmias 44 unstable angina 44 pulmonary function 44 MRIs 44 pulse 44 acute coronary syndrome 44 cardiologist 43 coronary artery 43 MRI scanner 43 heart palpitations 43 chest X rays 43 blood sugar 43 chest pains 42 obstructive sleep apnea 42 chest X ray 42 cardiac arrhythmias 42 coronary disease 42 automated external defibrillator 42 coronary arteries 42 noninvasive 42 infarction 42 prostate specific antigen 42 invasive procedure 42 aneurysm 42 sleep apnea 42 biopsies 41 myocardial infarction 41 mm Hg 41 vitals 41 sudden cardiac arrest 41 PET scan 41 appendicitis 41 EEG 41 lung function 40 angioplasty 40 acute myocardial infarction 40 hematocrit 40 PET scans 40 CT scans 40 ischemia 40 Ultrasound 40 intraoperative 40 cardiovascular 39 echocardiography 39 X ray 39 stethoscope 39 CAT scans 39 magnetic resonance imaging 39 vascular 39 Defibrillators 39 physiological 39 defibrillation 39 electrophysiology 39 coronary artery bypass 39 physiologic 39 revascularization 39 diagnostic 39 neurological 39 systolic blood pressure 39 ultrasounds 39 outpatient procedure