Patient was educated on causes and risk factors for angina as follows:

High altitudes

• Atmospheric pressure is needed for dissolving oxygen, which is important for oxygen to be transported in the blood, bound to hemoglobin.
• At high altitudes, the atmospheric pressure will be lower than normal and consequently, oxygen will be poorly dissolved and is difficult to be transported in blood, bound to hemoglobin.
• This results in reduced oxygen supply to all body tissues, including the cardiac muscle and can precipitate episodes of angina.

Cold weather

• Cold environmental temperatures can result in generalized constriction or collapse of blood vessels, including coronary blood vessels, in an attempt to conserve body heat.
• This collapse of coronary arteries can compromise blood supply to the heart, and lead to angina.

Blood clots

• Blood clots formed in the circulation can cause sudden and severe blocking of the coronary arteries.
• This blockage of coronary arteries can compromise the blood supply to the heart and lead to the disproportion between the demand and oxygen supply to cardiac muscle and consequent chest pain.