Monday, February 06, 2006

Electrocardiograms

Here's what i gleaned from Guyton - on what i need to know for cardiac abnormalities (any corrections would be appreciated).

Axis Deviation
1) Left axis with no prolonged QRS: LV hypertrophy
2) Right axis with no prolonged QRS: RV hypertrophy
3) Left axis with prolonged QRS: Left bundle branch block
4) Right axis with prolonged QRS: Right bundle branch block

Arrhythmias
1) Elevated ST: myocardial infarction
2) QRS interval reduced/prolonged: tachycardia/bradycardia
3) No P waves: SA block
4) Prolonged PR: 1st degree AV block
5) Dropped beats, P wave without QRS-T: 2nd degree AV block
6) P waves dissociate from QRS-T: 3rd degree AV block
7) Low voltage, very irregular waves: V fib
8) No P waves, QRS-T irregular timing: A fib

Hopefully this is not disastrously wrong. Guyton doesn't have 12lead EKGs though. Dang. Ok, 5 chapters of Cardiac physio done. Onward with more cardiac physio. Flow and resistance - physicsy stuff.

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