My mother is 83 years old. For the past several years she has been experiencing episodes of what she refers to as "cold sweats". These episodes can occure day or night and begin with breaking out in a cold sweat. I've had her check her heart rate during these episodes with here blood pressure devise that also records heart rate. She normally has a rate in the mid to high 60's, but during an episode it is in the mid 30's. Her last 2 doctors have just shrugged off her symptoms.