Which condition should prompt a patient taking diltiazem to notify their healthcare provider?

A heart rate of 32 beats per minute indicates bradycardia, which is a significantly low heart rate that can be dangerous. Diltiazem is a calcium channel blocker often used to manage hypertension and certain types of arrhythmias. It works by slowing the heart rate and reducing the force of contraction, so it can lead to bradycardia as a side effect.

When patients on diltiazem experience a heart rate this low, it can lead to inadequate blood flow to vital organs, possibly resulting in symptoms like dizziness, fatigue, or fainting. Therefore, it is crucial for the patient to notify their healthcare provider immediately to assess the situation and determine if any adjustments to their medication or further evaluations are necessary.

While other conditions, like a rash or a heart rate of 70 beats per minute, may warrant attention, they do not represent the same level of immediate concern as a heart rate of 32 beats per minute. Blood pressure readings under 120/80 mmHg might also not be alarming depending on the patient's baseline, making bradycardia the priority in this scenario.