Heart disease and stroke are known to be some of the major causes of death in the world. But most incidences of death by heart attack or stroke are preventable. .Checking blood pressure at regular intervals may help prevent heart disease and may also help diagnose heart disease and stroke beforehand. A recent research study published in the journal New England Journal of Medicine has found that both systolic and diastolic blood pressure numbers indicate the risk of heart attack and stroke.Systolic pressure is the pressure in the blood vessels when the heart beats. Diastolic pressure is the pressure in the blood vessel when the heart rests between the two beats. American Heart Association recommends 120/80 mm/Hg as normal blood pressure. The research study analysed the blood pressure data of 1.3 million people to understand their risk of developing heart attack, blood clot in the vessels and stroke, based on their systolic and diastolic blood pressure numbers.The analysis showed that although high systolic blood pressure posed a high risk of heart disease, both blood pressure numbers may equally impact heart health. It is recommended to consult your doctor and regularly check your blood pressure.