abnormal ecg sinus tachycardiaabnormal ecg sinus bradycardiasinus rhythm abnormalabnormal sinus rhythm ekgmarked sinus bradycardia abnormal ecgecg sinus rhythm left axis deviationsinus rhythm left atrial abnormalityecg sinus tachycardiaecg sinus bradycardiaecg report sinus tachycardia12 lead ecg sinus tachycardiasinus bradycardia otherwise normal ecg