The heart is not strong due to heart problems, but some non-heart reasons can also lead to feel the heart is not strong: 1, general cardiac insufficiency patients, often manifested as fatigue, double lower extremity edema, shortness of breath after activity, patients often say that feel the heart is not strong and even the whole body is not strong. In addition, coronary heart disease, myocarditis caused by various reasons of bradycardia will also make people feel the heart is not strong. 2, causes other than the heart can also lead to, such as common anemia or hypoglycemia, it is recommended to go to the routine blood test, blood glucose examination, and can do dynamic electrocardiography. 3, some menopausal middle-aged women because of plant nerve disorders can also appear heart is not strong, this is not a big problem.