(Medication helps to control heartbeat)
Group 1 antiarrhythmics
Sodium-channel blockers, which block the fast sodium channels, thereby slowing electrical conduction in the heart.
Group II antiarrhythmics
Beta-blockers. These work by blocking sympathetic nervous system stimulation to the heart, thereby reducing the transmission of impulses within the heart’s conduction system.
Group III antiarrhythmics
Potassium-channel blockers, bind to and block the potassium channels which prolongs repolarization of the cell membrane.
Group IV antiarrhythmics
Calcium-channel blockers, which inhibit the calcium channels reducing the movement of calcium ions in the cells during action potentials.
Group V antiarrhythmics
Agents which work by other mechanisms according to the Vaughan-Williams classification.
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