### Patient: Hi doctor, I have been experiencing sleepiness, back cramps, and palpitations recently. Do you know what might be causing these symptoms?
### Doctor: Yes, based on your symptoms you may be experiencing premature ventricular contractions or PVCs. These are extra, abnormal heartbeats that can cause the sensation of palpitations. The lack of sleep caused by your sleepiness might also be contributing to your palpitations. The back cramps you are experiencing could be a result of the stress and anxiety caused by your symptoms.