Cough at midnight

How come cough caused by heart failure doesn't comes during daily night sleep. Rather it comes once a while during sleep at midnight making to wake up with a few burps and saliva?
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Doctor Answers (1) on Cough at midnight

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Dr. Ashish Srivastava
5 yrs. of exp | Noida | Cardiologist
First of all I would like to know are you a patient of congestive heart failure If yes what medication you are on It can happen that cough and breathlessness can come only off and on This happens because of more venous return to the heart in lying down
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