Should i be worried about "marked bradycardia"? 58 yr old female, fairly healthy. my hr is typically 46-50. primary care md doesn't seem concerned

Maybe, he's right.: Your EKG says "marked bradycardia" suggesting sinus bradycardia or a slower than normal but still regular heart rate. It can be due to medication (Rx or OTC) effect or interaction between medications, alcohol, drugs, electrolyte abnormalities, or certain medical conditions (heart, endocrine, etc). It can also be normal due to high-level regular exercise. Discuss your concerns with your MD.