What changes in excitability coincide with the occurrence of a monophasic action potential?
Understand the Problem
The question is asking about the changes in excitability that occur during different phases of a monophasic action potential. We need to analyze the options provided to identify the correct statement regarding excitability in relation to the action potential phases.
Answer
Changes in myocardial excitability and repolarization coincide with monophasic action potentials.
The changes in excitability coinciding with a monophasic action potential predominantly relate to alterations in myocardial excitability and the repolarization process. These changes are impacted by factors like electrotonic phenomena and asynchrony in activation.
Answer for screen readers
The changes in excitability coinciding with a monophasic action potential predominantly relate to alterations in myocardial excitability and the repolarization process. These changes are impacted by factors like electrotonic phenomena and asynchrony in activation.
More Information
Monophasic action potentials (MAPs) are valuable in assessing cardiac excitability and repolarization. Changes in MAPs can help understand the effects of pharmaceuticals and electrotonic interactions.
Sources
- Monophasic action potentials: concepts to practical applications - pubmed.ncbi.nlm.nih.gov
- The monophasic action potential upstroke: a means - AHA Journals - ahajournals.org
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