Most of the gastric drugs will not affect the twenty-four hour dynamic electrocardiogram, only a few drugs may have some effect on the twenty-four hour dynamic electrocardiogram, such as Vitamin U belladonna aluminum capsules and so on. 1. No effect: proton pump inhibitors: omeprazole, rabeprazole, esomeprazole; gastric mucosal protectants: aluminum phosphate gel, bismuth citrate potassium, etc. Generally there is no cardiac adverse effects so it will not affect the twenty-four-hour dynamic electrocardiogram. 2. Have an effect: antispasmodic drugs such as Vitamin U belladonna aluminum capsules, belladonna tablets, etc. because of anticholinergic drugs, so there will be an increase in the heart rate of the role of the twenty-four-hour dynamic electrocardiogram has a certain effect. If you need to do a twenty-four hour dynamic electrocardiogram during the period of taking medication, be sure to consult your physician to avoid examination bias.