The complex (wave) represents the sum of all ventricular muscle cell depolarizations
The Correct Answer is {"dropdown-group-1":"B"}
PR interval: the time it takes for the electrical impulse to travel from the sinoatrial (SA) node to the atrioventricular (AV) node
QT interval: the time it takes for ventricular depolarization and repolarization to occur
ST segment: the period between ventricular depolarization and repolarization, representing the plateau phase of the ventricular action potential.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Atherosclerosis is a condition where plaque buildup occurs inside the arteries, which narrows the arterial lumen and limits blood flow. Aneurysms can occur as a result of atherosclerosis when the plaque formation weakens and damages the arterial wall, making it prone to bulging outwards or rupturing. This weakening of the vessel wall can cause it to lose its elasticity and strength, leading to the formation of an aneurysm. Therefore, the correct answer is C - eroding the vessel wall.
Correct Answer is B
Explanation
Varicose veins occur when the valves within the veins, which normally prevent the backflow of blood, become damaged or weakened, allowing blood to pool and the veins to become enlarged and twisted. This can occur due to a variety of factors, including age, pregnancy, obesity, genetics, and prolonged periods of standing or sitting. An increase in hydrostatic pressure can contribute to the development of varicose veins, but it is not the primary cause.
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