Feeling weakness of the heart may be due to reduced blood ejection from the heart, inadequate blood supply to the heart muscle or overexertion, anemia, or loss of health after a long illness. Symptoms such as distention and discomfort in the precordial region, panic, palpitations and weakness may occur. You can do an electrocardiogram and cardiac ultrasound to see. If there is myocardial ischemia can be treated with drugs that nourish the heart muscle and dilate the coronary arteries. Such as compound danshin tablets, blood house and blood stasis pill. Feelings of heart weakness usually should avoid strain, ensure sufficient sleep, reduce the stimulation of mental factors. General Chinese medicine of Qi and Blood deficiency, also will appear weakness of limbs, heart trapped heavy and other symptoms. It can be treated with Chinese herbal medicines that replenish qi and blood, such as Sheng Wei Yin (生脉飲) and Shi Quan Da Teng Wan (十全大补丸).