Normal heart rate in people is 60-100 beats per minute. But if the heart rate is lower than 60 beats per minute, that may indicate bradycardia development. If the pulse is constantly 30-40 beats per minute and it doesn’t increase even during physical activity, it’s a quite dangerous condition.
Single ventricle heart defects. You all know that heart has four chambers. The first two upper chambers of heart are collectively called as atria, and atria collect the blood flowing into the heart