ECG Lead System Exam Questions with Correct Answers

ECG Lead System Exam Questions with Correct Answers Electrocardiogram (ECG) - Answer-Since you can't see the heart beating we use a ECG to provide a picture that replicates the actual cardiac issue. Myocardial Infraction (MI) - Answer-Heart Attack -Have abnormal rhythms. -Death of cardiac muscle due to ischemia Doe the ECG machine monitor or control the hearts rhythm? - Answer-Only monitors Straight line when machine is turned on but not connected to the patient - Answer- Isoelectric = no current It is straight because there is a balanced electrical force field. This Isoelectric line acts as a starting point for the patterns to be displayed ECG Pattern - Answer-Upward Pattern: electricity flowing from the heart to the electrodes moving to the positive electrode Downward Pattern: electricity flowing from the heart to the electrodes moving away from the positive electrode Where should you put electrodes ? - Answer-1. Close to bone 2. Over soft tissue Where should you NOT put electrodes - Answer-1. Thick muscles 2. Skin Folds 3. Bony prominence's they can cause ECG artifacts that take away from the reading Leads - Answer-recordings of heart activity from several angles around the heart (like adjusting the view for your camera)