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Questions and Answers
Which structure in the heart acts as the cardiac pacemaker?
Which structure in the heart acts as the cardiac pacemaker?
- Sinoatrial (SA) node (correct)
- Bundle of His
- Atrioventricular (AV) node
- Purkinje fibers
What may cause the death of pacemaker cells or conducting tissue in the heart?
What may cause the death of pacemaker cells or conducting tissue in the heart?
- A cardiac tissue disorder
- Sympathetic control changes
- An infarction (correct)
- Circulating drugs
Which factor is not mentioned as a potential cause of arrhythmias?
Which factor is not mentioned as a potential cause of arrhythmias?
- Smoking
- High cholesterol levels (correct)
- Alcohol consumption
- Rheumatic fever
Which part of the heart conducts the electrical current throughout the ventricular tissue?
Which part of the heart conducts the electrical current throughout the ventricular tissue?
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What is the normal resting heart rate maintained by?
What is the normal resting heart rate maintained by?
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