Heart Emotions: Lack of enthusiasm and vitality, mental restlessness, depression, insomnia, despair. Heart Function: Regulates the heart and blood vessels. Responsible for even and regular pulse. Influences vitality and spirit. Connected with the tongue, complexion, and arteries. Symptoms of Heart Imbalance: Insomnia, heart palpitations and irregular heart beat, excessive dreaming, poor long-term memory, psychological disorders. Heart Conditions: Heart Yin and Heart Fire.