You should have your husband see his doctor on the issue as it is not a side effect nor a symptom of heart failure and an abnormal condition that would have other implications
Thanks for your question and sharing your husband's experience. If you have any follow-up questions or comments you are welcome to respond. Having CHF a year ago or so does not indicate your husband's system is not pumping adequately at the current time. I had CHF about 7 years ago, and with medication, etc.