In the pharmacological management of cardiac arrhythmias, the following is/are true:
belongs to book: ASIR SURGICAL MCQs BANK|Dr. Gharama Al-Shehri|1st edition| Chapter number:12| Question number:156
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belongs to book: ASIR SURGICAL MCQs BANK|Dr. Gharama Al-Shehri|1st edition| Chapter number:12| Question number:156
total answers (1)
a. Membrane-stabilizing local anesthetics (Class 1) act via sodium channel blockage
d. Bretylium and other Class 3 drugs inhibit potassium influx into cells
e. Calcium channel blockers (Class 4) directly affect the SA and AV nodes
Class 1 drugs are local anesthetics that act via sodium channel blockade, and lengthen the refractory period. Class 2 b-blocking drugs inhibit both the sympathetic nervous system and circulating catecholamines. Class 3 drugs inhibit potassium influx into cells and Class 4 drugs affect slow channel-dependent pacemaker tissue (SA and AV nodes).
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