Indigestion is a possible digestive cause of heart palpitations, along with gallstones and gastroesophageal reflux disease, according to My Doctor Online. More general causes include high amounts of stress, stimulant intake, overactive thyroid gland, smoking and pregnancy. Asthma inhalers, pseudoephedrine and beta blockers are medications that can cause heart palpitations.
Heart palpitations vary in their frequency, intensity and type of sensation felt, explains My Doctor Online. Some heart palpitations may resemble a fluttering sensation, while others give the feeling of a racing or pounding heart. Heart palpitations can also affect the neck and throat areas. Fast, persistent palpitations, while uncommon, may indicate heart arrhythmia. Heart palpitations accompanied by chest pain, faintness, sweating, confusion or difficulty breathing require emergency care.