12 Questions
What is the main effect of digoxin on myocardial contraction?
Increases the force of contraction
Why should patients with renal dysfunction receive smaller doses of digoxin?
It is excreted through the kidneys
What is a key concern associated with digoxin therapy?
Digitalis toxicity
Why is the serum potassium level monitored in patients taking digoxin?
Effect of digoxin is enhanced in hypokalemia
During which phase are coronary arteries perfused?
Diastole
Which layer of the heart is responsible for the pumping action?
Myocardium
Which factor contributes most significantly to the risk of falls in patients with orthostatic hypotension?
Dizziness and lightheadedness
Which imaging technique is best suited for revealing areas of decreased blood flow in the heart?
Positron emission tomography scan
Which sequence correctly describes the electrical conduction pathway in the heart?
SA node, AV node, bundle of His, Purkinje fibers, right and left bundle branches
Which factor depresses the contractility of the heart?
Acidosis
Which medication was historically considered essential for heart failure treatment but is now less frequently prescribed due to newer alternatives?
Digoxin
What cardiac markers do not measure ejection fractions?
Troponin levels
Learn about the significant risk of falls associated with orthostatic hypotension, its impact on normal activities, and diagnostic tests such as echocardiogram and cardiac catheterization to estimate ejection fraction. Familiarize yourself with how positron emission tomography scans reveal decreased blood flow areas.
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