Hello. Thank you for your question and welcome to HCM. I understand your concern. Human organism suffers when it is exposed to extreme temperatures such as going from hot temperature to very cold. Every healthy and normal person s organism has very meticulously regulated compensatory mechanisms, and it is very quickly adjusted to regulate these exposures. Of course, some changes may be seen even in healthy organisms, such as a palpitation caused by a extrasystole. This phenomenon is benign especially when you know what caused it and no further treatment is required. Extrasystoles tend to be triggered by psychological stress and physiological stress to the body, such as in your case. If this was a one-time episode, then there is nothing to worry about, as you can tell yourself that you are not going to repeat the ice bucket challenge, even though it is for a good cause. A single episode with extrasystole, or more, but not often, episodes, do not cause any damage to the heart. Being a 62-years old female, not related to the episode you suffered, I would recommend you to have a cardiac check-up as part of preventive measures for cardiovascular disorders. Therefore, I would recommend you to do an EKG and an echocardiogram (to fully assess the motility and function of heart structures) and, if seen reasonable by your cardiologist, a cardiac stress test. Feel free to ask me again. I hope this answers your query. Wish you a good health. Best regards, Dr. Meriton