You are correct that it is often used to slow down fast heart rates but it is also sometimes used in persons with fainting due to strong heart contractions. I hope you find this information useful.
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Only your physician can provide specific diagnoses and therapies. Please feel free to write back with additional questions. The Heart Center website contains a directory of the cardiology staff that can be used to select the physician best suited to address your cardiac problem. Information contained within this forum is intended solely for general educational purposes and is not intended nor implied to be a substitute for professional medical advice relative to your specific medical condition or question. Only your physician can provide specific diagnoses and therapies.