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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
When the left ventricle is unable to pump blood effectively, blood backs up into the lungs, leading to pulmonary congestion and edema. This can cause symptoms such as shortness of breath, coughing, and wheezing. Decreased venous pressure and hyperoxygenation are not typically associated with left ventricular failure. Bradycardia may occur in some cases, but it is not a defining feature of left ventricular failure.
Correct Answer is B
Explanation
associated with chronic heart failure. Activation of the RAAS system occurs as a compensatory mechanism in response to decreased cardiac output and reduced renal perfusion. The renin-angiotensin-aldosterone system increases blood pressure, maintains blood volume and improves cardiac contractility in the short term, but in the long term it can lead to fluid retention, edema, and worsen cardiac function.
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