The effects are particularly noticeable during exercise or increased activity.Common Symptoms of Heart FailureShortness of breath with activity, or after lying downCough Swelling of feet and anklesAbdominal swellingWeight gain Call 911 for the following:Crushing chest painFaintingRapid and irregular heartbeatIrregular or rapid pulse Heart palpitationsDifficulty sleepingFatigue, weakness, faintness