Exam (elaborations)
PN 108 CARDIAC EXAM QUESTIONS AND ANSWERS
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PN 108 CARDIAC EXAM QUESTIONS AND ANSWERS...
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What is normal sinus rhythm?When the SA node completes a full cycle (60-100 bpm)
What is sinus bradycardia?
SA node rate is <60 BPM usually in response to one of three categories
of stimuli:
1. Physiologic (vagal tone)
2. Pharm (CCBs, BBs, Dig)
3. Pathologic (AMI, increased ICP, carotid sinus hypersensitivity,
hypothyroidism, sick sinus syndrome)
What is tachycardia?
abnormally fast heart rate, over 100 bpm
What is atrial fibrillation?
Irregular, rapid heart beat
What is ventricular tachycardia?
heart beats too fast to pump blood effectively
, What is asystole?
Absence of a heart rate.
What is the function of the SA node?
pacemaker of the heart
What is the function of the AV node?
Creates a slight delay between atrial contraction and ventricular
contraction.
What order does blood flow through the heart?
VC —> RA —> Tricuspid —> RV —> Pulmonic valve —> Pulmonary
Artery —> Lungs —> Pulmonary Vein —> LA —> Mitral valve —> LV —
> Aortic Valve —> Aorta
What does the QRS complex represent?
ventricular depolarization
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