tachycardia

“Ayala was also hypertensive and displayed abnormal tachycardia,” immigration officials wrote in the statement.

“My high blood pressure got too high. I started having tachycardia,” she said.

Others can develop something called POTS, which stands for postural orthostatic tachycardia syndrome, and can cause sharp spikes in the heart rate and dizziness.

In many cases of supraventricular tachycardia, the abnormal heart rhythm is caused by a small short-circuit in the heart's electrical circuitry.

A group of nine patients with ventricular tachycardia was evaluated with cardiac MRI before and after radiation treatment, with the MRIs showing improved heart function soon after radiation.