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
![Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans | Scientific Reports Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans | Scientific Reports](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-019-42552-9/MediaObjects/41598_2019_42552_Fig1_HTML.png)
Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans | Scientific Reports
![One You Westminster na Twitteri: "Do you know what your numbers mean? Your systolic pressure (the top number) is when your heart pushes blood out and your diastolic pressure (the bottom number) One You Westminster na Twitteri: "Do you know what your numbers mean? Your systolic pressure (the top number) is when your heart pushes blood out and your diastolic pressure (the bottom number)](https://pbs.twimg.com/media/E-wJ_4AXIAIr6yx.png)