EKG Certification Test Questions With Verified Answers

The use of non-invasive and painless ultrasound to examine the heart, its chambers and valves is known as: - Answer Echocardiology Waveforms may be displayed on a screen called an: - Answer Electrocardiogram The breastbone is referred to as: - Answer sternum The pericardial sac that surrounds the heart: - Answer Has a tough fibrous outer layer called the visceral pericardium and an inner, thin transparent lining called the fibrous pericardium What are the 3 layers of the heart wall? - Answer Epicardium, myocardium, endocardium The atrioventricular valve between the left atrium and the left ventricle is the: - Answer Mitral valve The wall that separates the two superior chambers of the heart is called: - Answer Interatrial septum The heart valves that separates the atria from the ventricles are called that: - Answer Atrioventricular valves The skeleton of the heart: - Answer Separates the atria from the ventricles The heart receives most of its own blood supply via the: - Answer Coronary arteries Regulation of the heart rate, speed of electrical conduction and strength of contraction are influenced by the brain via the ___ nervous system. - Answer Central The cardioaccelerator center: - Answer Is part of the sympathetic nervous system The most muscular chamber of the heart that forces blood through the aortic valve into the aorta would be the: - Answer Left ventricle During depolarization: - Answer Impulses are generated and transmitted when positively charged ions move inside the cell causing the interior to become positively charged Blood returns to the heart from the lungs via four blood vessels called: - Answer Pulmonary veins Blood travels to the lungs where carbon dioxide is unloaded and oxygen is loaded. The blood vessels that carry the blood from the heart to the lungs are: - Answer Pulmonary arteries During which phase of the cardiac cycle do the coronary arteries fill? - Answer Early systole How much of the blood coming into the ventricles flows passively through the atria? - Answer 80% With EKG paper: - Answer Five small squares, which make up a larger box, represent 0.20 seconds in duration On EKG paper horizontal measurements are used to determine the: - Answer The heart rate What is placed on the patient's skin to detect the heart's electrical activity? - Answer Electrodes Each small square running horizontally represents: - Answer .04 seconds The initiation of the impulse in the SA node and its movement through the atria produces a: - Answer P wave The T wave: - Answer Has a peak which is closer to the end than the beginning What is used as a reference point to identify the changing electrical amplitude? - Answer Isoelectric line