advanced ekg exam questions and correct answers 2026

advanced ekg exam questions and correct answers 2026 Diastole and systole Which are the two phases of the cardiac cycle? Diastole and systole Depolarization and repolarization Automaticity and conductivity Impulse transmission and resting potential Myocardium Which cardiac layer is the thick muscular layer? Epicardium Myocardium Endocardium Pericardium Cardiac cells at rest are considered polarized, meaning that no electrical activity takes place. Which statement best describes cardiac cells at rest? Cardiac cells at rest exhibit an action potential which is when the transmission of electrical impulses take place. Cardiac cells at rest are electrically charged in preparation for contraction. Cardiac cells at rest have positive electrical charges in the cell and negative charges outside. Cardiac cells at rest are considered polarized, meaning that no electrical activity takes place. left anterior descending artery. The coronary artery that supplies the anterior and ventricular septal walls of the heart is the: left circumflex artery. posterior descending artery. left anterior descending artery. right coronary artery. sa The primary pacemaker of the heart is: Bachmann's bundle. the bundle of His. the sinoatrial (SA) node. the atrioventricular (AV) node. When ions cross cell membranes to cause the cell to contract Which statement describes depolarization? When ions cross cell membranes to cause the cell to contract When cardiac cells are fully at rest When cardiac cells are returning to their resting state When cardiac cells are unable to contract automaticity. Cardiac cells have the ability to generate an electrical impulse which is called: vasodilation. contractility. automaticity. conductivity. inferior wall. The area of the heart just above the diaphragm is called the: