India, Oct. 3 -- Does climbing a flight of stairs make you feel a sudden adrenaline rush? For some, this feeling quickly fades away. For others, a heart beating faster than usual can be worrying, leaving them breathless and concerned. This raises an important question: Is this a normal reaction? Should we be worried about this experience? We asked a cardiologist.

Dr Niranjan Hiremath, Cardiovascular and Aortic Surgeon, Indraprastha Apollo Hospital, tells Health Shots: "As a cardiologist, I assure you that, in most instances, this response is a part of the body's natural physiology. However, there are situations when it could indicate something more serious."

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