Ventricular tachycardia Occurrence of 3 or more depolarization from a ventricular ectopic pacemaker at the rate faster than 100 bpm
Ventricular tachycardia
Ventricular fibrillation Totally disorganized depolarization and contraction of small area of ventricular myocardium No effective ventricular pumping activity Commonly in severe ischemic heart disease
VF Coarse VF Fine VF
Polymorphic VT
Torsade de pointes A specific variant of polymorphic VT in which the QRS axis swing from a positive to a negative direction in a single lead
Torsades de pointes
Bradyarhythmias
Sinus bradycardia Represent suppression of sinus node discharge rate Physiologic >> in well controlled athletes, during sleep, vagal stimulation Pharmacologic >> B-blocker, digoxin, opioids, calcium channel blocker Pathologic >> acute inferior wall MI, increase ICP, carotid sinus hypersensitivity, hypothyroidism
Sinus bradycardia
Atrioventricular block oเกิดจาก supraventricular impulse ไม่สามารถผ่านลงสู่ ventricle ได้ เนื่องจากมีความผดิ ปกตขิ องการนากระแสไฟฟา้ ที่ AV node o แบง่ เป็น 3 ชนดิ 1st degree AV block 2nd degree AV block 3rd degree(complete) AV block
1st degree AV block
2nd degree AV block Mobitz I (Wenckebach)
2nd degree AV block Mobitz II
Complete AV block : 3rd degree AV block
Complete AV block : 3rd degree AV block
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