Hi! is a inr at 1.4 with an irregular heart beat safe.

It depends: If you are on an anticoagulant such as Coumadin (warfarin) for treatment of atrial fibrillation, that would be too low. The reading should be between 2.0 and 3.0 for therapeutic benefit. If you are not on a blood thinner, an inr of 1.4 would be unusual.

This depends...: Your exact heart rhythm diagnosis should be discussed with your doctor. If you have something called atrial fibrillation, an inr of 1.4 is probably too low, and your Coumadin (warfarin) dose should be adjusted appropriately. Otherwise, you may be at risk for a blood clot to form within your heart, which may ultimately cause a stroke.

No: If irregular "heart beat" is atrial fibrillation, and if you are on warfarin for anticoagulation ( is that why you are checking your inr?), then a therapeutic level to prevent stroke is between 2 to 3.