| | Conditions & Treatments | Heart Disease Is 180 too fast for a 35 week fetal heartbeat? No, 180 is within the normal range for a 35 week fetal heartbeat, which would usually be between 120 and 160 beats per minute (bpm). Heart Disease - Related Articles How to Prepare for a Heart Scan Advances in Heart Failure: What’s on the Horizon? What Is the Difference Between Cardizem LA & CD? Plenty of Treatment Options for Atrial Fibrillation? AAA Disease How to Apply ECG Leads Amiodarone HCL Side Effects