Is Resting Heart Rate Of 45 A Cause For Concern?
I would explain as follows:
Welcome back on HCM!
Regarding your concern, I would explain that probably 45 beats per minute would not be considered an emergency situation.
BUT, EVEN AT 48 BPM OR LOWER, if this heart rate is persistent; doesn't increase proportionally with physical activity work load and limits your overall physical performance, then it is necessary to consult your doctor (or nearest ER service) for a careful medical review of your heart rhythm.
It is necessary to rule in/out several cardiac issues like an atrio-ventricular conductance disturbance (atrio-ventricular blocks) or a sick sinus syndrome (in the settings of persistent and symptomatic bradycardia).
Some medical tests are necessary as follows:
- resting ECG,
- an ambulatory 24 to 48 hours ECG monitoring,
- cardiac ultrasound,
- blood electrolytes level,
- blood thyroid hormone levels,
- renal function tests,
- complete blood count
You need to discuss with your attending doctor on the above mentioned issues.
In case of any further uncertainties, feel free to ask me again.
Hope to have been helpful to you!