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Effects on ECG

Metabolic and drug influences in ECG

QuestionAnswer
Hyperkalemia Widens QRS Flattens P wave T wave becomes peaked
Hypokalemia Flattens or inverts T wave Produces a U wave
Hypercalcemia Widens QRS Shortens QT interval
Hypocalcemia Prolongs QT interval
Hypothermia Elevates ST segment Slows rhythm
Digitalis Depresses ST segment Flattens or inverts T wave QT shortens
Quinidine QT lengthens T wave flattens or inverts QRS lengthens
Beta Blockets [ex: Propranolol(Inderal)] Decreases HR Blunts HR response to exercise
Nitrates (nitroglycerin) Increases HR
Antiarrhythmic Agents May prolong QRS and QT intervals
Created by: cdesai
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