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Human Body & Health

Which outcome results from hyperthyroidism induced tachycardia via excessive hormone-receptor binding?

A)Increased cardiac inotropy and chronotropy
B)Reduced ventricular contractility reserve
C)Decreased cardiomyocyte action potential duration
D)Induced sinoatrial node automaticity reduction

💡 Explanation

Hyperthyroidism causes increased thyroid hormone leading to excessive hormone binding to receptors in the heart, therefore increasing cardiac inotropy and chronotropy via heightened beta-adrenergic signaling, rather than decreasing contractility. Diminished cardiac reserve requires long pathologies.

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