Podcast
Questions and Answers
What effect does sympathetic stimulation have on the action potential of the SA node?
What effect does sympathetic stimulation have on the action potential of the SA node?
Which condition leads to an increased resting membrane potential (RMP)?
Which condition leads to an increased resting membrane potential (RMP)?
What is the conduction rate of the AV node in m/s?
What is the conduction rate of the AV node in m/s?
What is the role of epinephrine in relation to the SA node?
What is the role of epinephrine in relation to the SA node?
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Which of the following can cause negative chronotropic effects?
Which of the following can cause negative chronotropic effects?
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What effect does depolarization have on the membrane potential of cardiomyocytes?
What effect does depolarization have on the membrane potential of cardiomyocytes?
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Which part of the heart initiates the depolarization wave?
Which part of the heart initiates the depolarization wave?
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What is a consequence of the AV node being slow conducting tissue?
What is a consequence of the AV node being slow conducting tissue?
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What causes the peak of the ventricular septal depolarization to show a negative deflection?
What causes the peak of the ventricular septal depolarization to show a negative deflection?
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Why is atrial repolarization not visually represented in the ECG?
Why is atrial repolarization not visually represented in the ECG?
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What is the primary function of the specialized anatomy described?
What is the primary function of the specialized anatomy described?
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What role do intercalated disks play in the heart's function?
What role do intercalated disks play in the heart's function?
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Which component strengthens the connections between heart muscle cells?
Which component strengthens the connections between heart muscle cells?
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What type of junctions are responsible for electrical connections in cardiac tissue?
What type of junctions are responsible for electrical connections in cardiac tissue?
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Why is it important for cardiac muscle cells to depolarize in a specific order?
Why is it important for cardiac muscle cells to depolarize in a specific order?
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What is the purpose of the smooth, slippery structure surrounding the heart?
What is the purpose of the smooth, slippery structure surrounding the heart?
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Which type of blood do veins primarily return to the heart?
Which type of blood do veins primarily return to the heart?
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What role does the conduction system of the heart play?
What role does the conduction system of the heart play?
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What does the presence of cardiac troponin (cTn) in the serum indicate?
What does the presence of cardiac troponin (cTn) in the serum indicate?
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What is primarily responsible for causing Acute Coronary Syndromes (ACS)?
What is primarily responsible for causing Acute Coronary Syndromes (ACS)?
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Which type of myocardial infarction is associated with the most severe ischemic damage?
Which type of myocardial infarction is associated with the most severe ischemic damage?
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Which factors are significant in determining the severity of EKG changes in ACS?
Which factors are significant in determining the severity of EKG changes in ACS?
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Why is the endocardium more vulnerable to ischemia compared to the epicardium?
Why is the endocardium more vulnerable to ischemia compared to the epicardium?
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What physiological change occurs due to vessel occlusion in ACS?
What physiological change occurs due to vessel occlusion in ACS?
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What is the anatomical direction of blood perfusion in coronary arteries?
What is the anatomical direction of blood perfusion in coronary arteries?
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Which of the following is NOT a sign or symptom of ACS?
Which of the following is NOT a sign or symptom of ACS?
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What does ST elevation in an EKG indicate?
What does ST elevation in an EKG indicate?
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Which EKG change is associated with a non-STEMI?
Which EKG change is associated with a non-STEMI?
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Why does the EKG trace begin with a positive deflection during subendocardial infarcts?
Why does the EKG trace begin with a positive deflection during subendocardial infarcts?
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What does a 'true baseline' EKG represent?
What does a 'true baseline' EKG represent?
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What symptom led the EMT to suspect a heart attack in Art?
What symptom led the EMT to suspect a heart attack in Art?
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Why was Art given oxygen during his emergency treatment?
Why was Art given oxygen during his emergency treatment?
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What is the significance of Art being pale and sweaty?
What is the significance of Art being pale and sweaty?
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What is the purpose of starting an IV for Art?
What is the purpose of starting an IV for Art?
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What is a characteristic EKG alteration in atrial flutter?
What is a characteristic EKG alteration in atrial flutter?
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In the case of re-entry in the ventricles, which tissue is considered susceptible?
In the case of re-entry in the ventricles, which tissue is considered susceptible?
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What primary method is suggested to treat paroxysmal supraventricular tachycardia (PSVT)?
What primary method is suggested to treat paroxysmal supraventricular tachycardia (PSVT)?
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What happens to conduction and re-entry during ischemia?
What happens to conduction and re-entry during ischemia?
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In sustained tachycardia, what effect does uncoordinated stimulation have on the ventricular QRS?
In sustained tachycardia, what effect does uncoordinated stimulation have on the ventricular QRS?
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What is the atrial rate typically seen in atrial flutter?
What is the atrial rate typically seen in atrial flutter?
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What condition is indicated by damaged tissue conducting signals retrograde?
What condition is indicated by damaged tissue conducting signals retrograde?
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Which medication is mentioned as a beta-blocker for treating supraventricular tachycardia?
Which medication is mentioned as a beta-blocker for treating supraventricular tachycardia?
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