Hello! Welcome and thank you for asking on HCM! Hiccups is a normal physiological reflex, related to the diaphragm movements. An elevation of the diaphragm or abdominal distension could cause this clinical scenario. From the other hand the heart lies right over the diaphragm. That is why diaphragm elevations can cause palpitations. I recommend consulting with your attending physician for a careful physical exam and performing some tests: - a resting ECG - an abdominal ultrasound - some blood lab tests (complete blood count, blood electrolytes, kidney and liver function tests). There are several treatments for hiccups (baclofen, chlorpromazine, metoclopramide). It usually resolves spontaneously. You should discuss with your doctor on these options. Hope to have been helpful! Kind regards, Dr. Iliri