What causes heart palpitations and sudden cough?

Arrhythmia : Sometimes skipped heart beats knows as premature ventricular or atrial contractions (pvc, pac) cause these symptoms, these are benign. There other causes of palpitations like a supraventricular tachycardia, or ventricular tachycardia, these are more serious and should be investigated. I recommend that you discuss this with your doctor and get a holter monitor to find put what is causing them.