Not good.: Hr of 164 is very high even during pregnancy. Need to see cardiologist and checked out for arrhythmias( supraventricular tachycardia, atrial fibrillation, atrial flutter, junctional tachycardia or ventricular tachycardia. At that hr unlikely to be sinus tachycardia. Recommend to see cardiologist asap.
Answered 9/10/2013
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