Could overeating cause heart palpitations?

Yes: Overeating does increase physical stress on the heart. It is not normal to have symptoms, which would include palpitations, when the heart is experiencing increased physical stress. Further evaluation including possibly a stress test is indicated in this setting.

See below: In an anxious person, overeating, feeling bloated or other discomfort is more likely to trigger your the nerves that control heart rhythms - palpitations might result in those who are at risk.