Prep4USMLE Forum » USMLE Step 1 Forum » Pharmacology Forum |   quinidine vs digoxin

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Kazem Forum Elite Topics: 76 Posts: 296	01/14/05 - 07:12 PM             #1 please compare their effects on the vagal activity of the heart.
mjl1717 Forum Hero Topics: 959 Posts: 5,467	01/14/05 - 10:49 PM             #2 Dig -increases the contractilitybut DECREASES rate may cause short QT interval Quinidine used for V. tach, A.fib,supraventricuar arrythmias also Decrease rate-so they make the vagus more dominant. May cause prolonged QT interval ___________________ Smell the coffee! "Is That an Osler move??"
Kazem Forum Elite Topics: 76 Posts: 296	01/15/05 - 09:07 AM             #3 Quinidine has vagolytic properties------> inc heart rate Digoxin has vagomimetic properties------> dec heart rate

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