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Cardiac electrophysiology

Electrophysiology

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1. Establish an Accurate Diagnosis of AF1 ? AF is characterized by replacement of consistent P waves with fibrillatory waves, varying in amplitude, shape, and timing. ? The ventricular response is irregular and frequently rapid when AV nodal conduction is intact. ? In patients with pacemakers, diagnosis of AF may require temporary inhibition of the pacemaker to expose atrial activity. ? AF should be distinguished from 1) atrial flutter, which has regular organized atrial activity with a rate typically between 240 and 320 bpm, 2) multifocal atrial tachycardia, which has 3 or more distinct P waves of vari- able morphology, 3) regular supraventricular tachycardias, such as AV nodal reentry and 4) sinus rhythm (SR) with multiple premature atrial complexes.

Diastolic Pressure Notes

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Cardiovascular Vocabulary Diastolic Pressure - the blood pressure (as measured by a sphygmomanometer) after the contraction of the heart while the chambers of the heart refill with blood. Arteriole - A small branch of an artery leading into capillaries. Cardiac Output - the amount of blood pumped out by the ventricles in a given period of time. Atrioventricular valve - either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium. Bicuspid Valve - valve with two cusps; situated between the left atrium and the left ventricle. Systolic Pressure - the blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart.
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