### Patient: Doctor, I have been experiencing sudden, rapid heartbeats and chest discomfort. It usually lasts for a few minutes and then goes away. What do you think is the problem?
### Doctor: It sounds like you may be experiencing paroxysmal supraventricular tachycardia. To diagnose this condition, we would need to conduct a series of medical tests. These include a hematologic test, an electrocardiogram, a complete blood count, radiographic imaging procedures, intravenous fluid replacement, a plain x-ray, and cardiac enzymes measurement.