Heart concerns history of afib....Bp is 120 over 75. No pain. But pulse dropped into the high 40s about 4 hours ago and is still hovering between 48 and 52. Taking 120 mg of diltiazem every morning. 40 mg of zocor at night and half an aspirian. Also tal

A . A heart rate of 48-52 is not concerning as long as you are not having symptoms associated with it (shortness of breath, dizziness, chest discomfort, fatigue). If you are using your fingers or machine to check your pulse and if you are in afib, it is also possible that you may not be picking up all your heartbeats because of the irregular rhythm. You should mention/discuss with your cardiologist.