Medca EKG Practice Questions | latest 2023/2024

Medca EKG Practice Questions | latest 2023/2024 A device on the skin that picks up electrical impulses given off by the heart is known as - electrode The heart is located - on the left side of the chest The body returns oxygen-poor blood to the heart via the - vena cavae In lead l, activity of the heart is being measured from - the right arm to the left arm The human heart weighs approximately - 11 ounces What position should the patient be in for an ECG - supine Where is the chest electrode V2 located - at the fourth intercostal space at the left margin of the sternum Lead l, ll, lll are called - standard leads The right and left atrium are the __________chambers - receiving The atria contains what kind of blood - both oxygenated and deoxygenated blood The __________ valve separates the left ventricle from the aorta - aortic The __________ regulate the flow of blood into and out of the proper chambers - valves Which electrode is used as a ground reference - right leg The standard ECG consists of how many leads - 12 The contraction of the heart muscle is cause by the flow of ___________ through the muscle tissue - electrical impulse The __________ pressure is the pressure inside the arteries during ventricular contraction; when blood is pumped from the heart to the body - systolic The ECG tracing should be performed in a quiet environment because - interference is minimized (True or False) The ECG records the actual image of the heart - false The hardest working chamber if the heart is the - left ventricle What is the term used to refer to an electrocardiogram that is within normal limits - normal sinus rhythm The augmented leads are - unipolar The epicardium is the - outer layer of the heart wall The ability of the pacemaker cells of the heart to create an electrical impulse without being stimulated from another source - automaticity The precordial leads include - leads V1 to V6 The QRS complex represents - contraction of the ventricles The "rhythm strip" is usually lead - lead ll (True or False) An ECG can be used to determine blood pressure - false The heart has how many valves - four: mitral, tricuspid, aortic, pulmonic If the SA node does not simulate electrical impulses in the heart, this function is usually taken over by - AV node Which wave is the first wave of the cardiac cycle - p wave Which wave represents repolarization of the ventricles - t wave What are artifacts - interference picked up by the ECG machine