Everyday Health - Systolic pressure is the top or first number in your blood pressure reading; it indicates the pressure within your arteries when your heart pumps out blood. Diastolic pressure is
![Higher Standards Home Health on X: "A blood pressure chart has an x and y-axis. This represents your systolic and diastolic blood pressure. The top number is systolic while the bottom number Higher Standards Home Health on X: "A blood pressure chart has an x and y-axis. This represents your systolic and diastolic blood pressure. The top number is systolic while the bottom number](https://pbs.twimg.com/media/EDCMZCgWsAEv_SN.jpg)
Higher Standards Home Health on X: "A blood pressure chart has an x and y-axis. This represents your systolic and diastolic blood pressure. The top number is systolic while the bottom number
![American Heart Association on X: "About 21% of U.S. adults – about 53 million people – have blood pressure that's considered a little too high. This is measured by a top number ( American Heart Association on X: "About 21% of U.S. adults – about 53 million people – have blood pressure that's considered a little too high. This is measured by a top number (](https://pbs.twimg.com/media/E25eD0wXMAIg7Ri.jpg)