Module 1 & 2 Assessment Flashcards
The atrial electrical activity in atrial fibrillation is very rapid, ____________, but each electrical impulse results in the activation of only a small islet of atrial myocardium rather than the whole atrium.
aproximately 400 BPM to 700 BPM
The _____ is a large muscular chamber that pumps blood across the aortic valve, into the systemic circulation.
Left Ventricle
The presence of an arrhythmia _________.
does not necessariy indcate that carciac dlsease is present
which of the following treatments have been used to treat Torsades de Pointes?
A) Magnessum sulfate
B) lsoproterenol
D) a and b
A pulse of electrical excitation originating in specialized pacemaker cells is responsible for initiating each heartbeat
under normal circumstances
What are effective in suppressing VPBS and other arrhythmias?
Beta blockers
The mitral valve has _______ leaflets, and the other valves each have _____ leaflets.
two, three
Which type of block usually occurs in the AV node itself and may be caused by rheumatic fever, the acute phase of an inferior myocardial infarction, or drugs such as digitalis, beta-adrenergic blockers, or calcium-channel blocker?
Second-degree AV block
The _______ represents repolarization of the ventricle.
ST Segment
From a ______ the physician can determine the rate, PR interval, and QRS duration, tell whether the rhythm is regular or irregular, and often name the arrhythmia
rhythm strip
___________ is initiated near the end of ventricular diastole by the depolarization of the atrial muscle cells
Atrial Contraction
Chronic complete AV block is usually caused by block in __________.
in the AV node
