I didn’t know that coughing had a good side until a few moments ago when I read this:
A breath and a vigorous cough must be repeated about every two seconds without let-up until help arrives, or until the heart is felt to be beating normally again.Deep breaths get oxygen into the lungs and coughing movements squeeze the heart and keep the blood circulating. The squeezing pressure on the heart also helps it regain normal rhythm. In this way, heart attack victims can get to a hospital. Tell as many other people as possible about this.
Source: How To Survive A Heart Attack When You Are Alone. – Health – Nigeria Medical experts, please give us more tips.