NURS 472 Lecture Notes - Lecture 3: Torsades De Pointes, Ventricular Fibrillation, Ventricular Tachycardia
19 Jan 2018
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3 or more consecutive pvcs occurring in a rapid rate. Sa node continues to fire, but ectopic pacemakers in ventricles fire spontaneously regardless of the sa impulse. Clinical significance: may deteriorate into vf, or it may lead to decrease in co and loss of oxygen delivery to tissues. When no oxygen worry about the brain and kidneys. S/s: alert or experience loss of consciousness; hypotension. If pulseless: do unsy(cid:374)(cid:272)hro(cid:374)ized (cid:272)ardio(cid:448)ersio(cid:374) becau e it an emergency and we don(cid:863)t. If pt has pulse but unstable: synchronized cardioversion. Vtach has wide qrs but fairly regular usually rate is greater than 100. Torsades is a specific type of vt (cid:862)t(cid:449)isti(cid:374)g of the poi(cid:374)ts(cid:863) Caused by conditions that prolong the qt including medications), electrolyte imbalances (especially magnesium) Treatment includes iv magnesium or cardioversion/ defibrillation: ventricular fibrillation. Fatal rhythm resulting from weak, ectopic impulses from multiple parts of ventricles; often due to mi. Start cpr immediately (cid:272)ode re(cid:373)e(cid:373)(cid:271)er to (cid:271)e a(cid:449)are of patie(cid:374)t"s (cid:272)ode status.
