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Understanding Orthostatic Hypotension Risks and Diagnostic Tests

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Understanding Orthostatic Hypotension Risks and Diagnostic Tests

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Questions and Answers

What is the main effect of digoxin on myocardial contraction?

Increases heart rate

Increases the force of contraction (correct)

Decreases the force of contraction

Slows down relaxation

Why should patients with renal dysfunction receive smaller doses of digoxin?

To increase its effectiveness

It accumulates in the liver

It is excreted through the kidneys (correct)

It is metabolized faster

What is a key concern associated with digoxin therapy?

Improved myocardial perfusion

Increased heart rate

Decreased blood pressure

Digitalis toxicity (correct)

Why is the serum potassium level monitored in patients taking digoxin?

Effect of digoxin is enhanced in hypokalemia Signup and view all the answers

During which phase are coronary arteries perfused?

Diastole Signup and view all the answers

Which layer of the heart is responsible for the pumping action?

Myocardium Signup and view all the answers

Which factor contributes most significantly to the risk of falls in patients with orthostatic hypotension?

Dizziness and lightheadedness Signup and view all the answers

Which imaging technique is best suited for revealing areas of decreased blood flow in the heart?

Positron emission tomography scan Signup and view all the answers

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 Signup and view all the answers

Which factor depresses the contractility of the heart?

Acidosis Signup and view all the answers

Which medication was historically considered essential for heart failure treatment but is now less frequently prescribed due to newer alternatives?

Digoxin Signup and view all the answers

What cardiac markers do not measure ejection fractions?

Troponin levels Signup and view all the answers