BASIC DYSRHYTHMIA COURSE exam questions and answers with solutions 2025

SA node - ANSWER the major pacemaker of the heart 60-100 - ANSWER inherent rate of the SA node 40-60 - ANSWER inherent rate of the AV node 20-40 - ANSWER inherent rate of the ventricles (purkinjie fibers) systole - ANSWER phase of contraction diastole - ANSWER phase of relaxation p wave - ANSWER what does atrial depolarization show on the ECG? QRS complex - ANSWER what does ventricle depolarization show on the ECG? T wave - ANSWER what does repolarization show on the ECG? increase - ANSWER what does sympathetic stimulation do to the heart rate? decrease - ANSWER what does parasympathetic stimulation do to the heart rate? absolute refractory period - ANSWER the period immediately following the firing of a nerve fiber when it cannot be stimulated no matter how great a stimulus is applied relative refractory period - ANSWER during the ventricular cardiac cycle when all cardiac cells are not fully repolarized and a strong enough stimulus can excite cardiac tissue and initiate arrhythmias