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Chapter 21 Quizes / Homework
Terms in this set (70)
Ventricular depolarization is represented by the _________ on an ECG.
What is the maximum number of doses of nitroglycerin that may be administered?
What is the intrinsic firing rate of the SA node?
What is a diagnostic procedure in which the coronary arteries are examined for blockage?
What type of medication is directed at treating an underlying mechanism of hypertension?
calcium channel blockers
What term refers to the pressure within the arterial system that must be overcome by the left ventricle?
The first event in the development of atherosclerosis is:
injury to the endothelial lining of an artery
What describes the polarized state of myocardial cells?
The sodium-potassium pump works to keep potassium inside the cell and sodium outside the cell, resulting in a relatively negative charge inside the cell.
What will help improve diffusion of oxygen across the respiratory membrane
An ECG complex that arises from an irritable pacemaker cell in the ventricle and occurs earlier than expected in the cardiac cycle is called:
a premature ventricular contraction
What is caused when myocardial oxygen demand is higher than the amount of oxygen that diseased coronary arteries can supply?
An extra electrical complex that occurs earlier than expected and arises from a site other than the SA node is called:
an ectopic beat
What medication may be indicated in cardiogenic pulmonary edema in a patient with hypertension, but must be avoided in a patient with pulmonary edema who is in cardiogenic shock?
What following refers to blood leaking into the pericardial sac?
When cardiac output drops below 90 mmHg because of left ventricular failure, the condition is called:
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