2 doctors weighed in:

Why does my heart rate slow when I stand up after sleeing hard?

2 doctors weighed in
Dr. Cynthia Thaik
Internal Medicine - Cardiology
1 doctor agrees

In brief: Can slow or increase

Standing up quickly causes blood to pool in the legs and causes the blood pressure to drop transiently.
How transient depends on how compensated a person is. If dehydrated, elderly, anemic, or diabetic, then the blood pressure can remain depressed and will actually lead to a fast heart rate. The only time that the hr would slow would be if the vagus nerve got activated - vasovagal response.

In brief: Can slow or increase

Standing up quickly causes blood to pool in the legs and causes the blood pressure to drop transiently.
How transient depends on how compensated a person is. If dehydrated, elderly, anemic, or diabetic, then the blood pressure can remain depressed and will actually lead to a fast heart rate. The only time that the hr would slow would be if the vagus nerve got activated - vasovagal response.
Dr. Cynthia Thaik
Dr. Cynthia Thaik
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