Afflictions of the heart and nervous system find rest with motherwort. History tells us that it is considered to be a cardio tonic as well as nervine tonic. Maude Greives tells us that there is “no better herb for strengthening and gladdening the heart.” Due to the presence of the chemical alkaloid leonurine, a mild vasodilator, motherwort acts as an anti-spasmodic to relax smooth muscles, one of those muscles being the heart. Chinese studies have also found motherwort to decrease clotting and the level of fat in the blood. That it can, in its calming nature, slow heart palpitations and rapid heartbeat. Motherwort has a mildly diuretic affect, also aiding high blood pressure. But it is important to note that while motherwort can be helpful in instances of high blood pressure, it is most appropriately effective when high blood pressure is a symptom of excess stress and anxiety.