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Questions and Answers
What is the result of increased [Ca2+]i in the heart?
What is the result of increased [Ca2+]i in the heart?
- Coupled beats, followed by ventricular tachycardia, and eventually ventricular fibrillation (correct)
- Ventricular fibrillation immediately
- No effect on the heart rhythm
- Increased heart rate without any abnormal rhythms
What is the most common site of digitalis toxicity outside the heart?
What is the most common site of digitalis toxicity outside the heart?
- Smooth muscle
- Gastrointestinal tract (correct)
- Kidneys
- Central Nervous System (CNS)
What is the cause of anorexia, nausea, vomiting, and diarrhea in digitalis toxicity?
What is the cause of anorexia, nausea, vomiting, and diarrhea in digitalis toxicity?
- Direct effects on the gastrointestinal tract only
- Effects on the heart rhythm
- CNS actions only
- Both direct effects on the gastrointestinal tract and CNS actions (correct)
What is the effect of digitalis on the CNS?
What is the effect of digitalis on the CNS?
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What is a rare effect reported in men taking digitalis?
What is a rare effect reported in men taking digitalis?
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What is the immediate effect of increased [Ca2+]i on the heart rhythm?
What is the immediate effect of increased [Ca2+]i on the heart rhythm?
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What is the effect of digitalis toxicity on the heart?
What is the effect of digitalis toxicity on the heart?
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What is the cause of visual disturbances in digitalis toxicity?
What is the cause of visual disturbances in digitalis toxicity?
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What is a common symptom of digitalis toxicity in the elderly?
What is a common symptom of digitalis toxicity in the elderly?
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What type of tissues are affected by cardiac glycosides?
What type of tissues are affected by cardiac glycosides?
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