Upper UTIs are infections of the kidneys. These are potentially life threatening, if bacteria move from the infected kidney into the blood. This condition is called sepsis. Sepsis can cause dangerously low blood pressures, shock, and death.
So whe you hold your breath, you stop getting oxygen in your lungs that go to your heart. The oxygen level in the blood drops, so your muscles need more oxygen, so the heart pumps faster. This is like running, your muscles need more oxygen so heart pumps faster
1 For rapid heart rates that are caused by shortness of breath, you may have trouble lying flat in bed, and you may have to sleep on 2 or more pillows. 2  Your shortness of breath may cause you to wake up in the middle of the night.3  If you have heart problems, your legs may be swollen, especially in your feet and ankles. For rapid heart rates that are caused by shortness of breath, you may have trouble lying flat in bed, and you may have to sleep on 2 or more pillows. 2  Your shortness of breath may cause you to wake up in the middle of the night.