Grade: C (Unclear or Conflicting Scientific Evidence)
Therapy	Specific therapeutic Use(s)
Aconite	Arrhythmia (abnormal heart rhythms)
Coenzyme Q10	Heart conditions (mitral valve prolapse in children)
Corydalis	Arrhythmia (abnormal heart rhythm)
L-Carnitine	Arrhythmia (abnormal heart rhythms)
Omega-3 fatty acids, fish oil, alpha-linolenic acid	Cardiac arrhythmias (abnormal heart rhythms)
Traditional or Theoretical Uses which Lack Sufficient Evidence
Therapy	Specific therapeutic Use(s)
Abuta	Palpitations
American hellebore	Arrhythmia (abnormal heart rhythms)
Astragalus	Palpitations
Bael fruit	Heart disorders
Barberry	Arrhythmia (abnormal heart rates)
Berberine	Ventricular tachyarrhythmias
Bitter orange	Heart disorders
Black cohosh	Heart disease/palpitations
Bloodroot	Palpitations
Calamus	Arrhythmia (irregular heartbeat)
Cat's claw	Arrhythmia
Chicory	Tachycardia (fast heart rate)
Cinnamon	Arrhythmia (irregular heartbeat)
Clay	Heart disorders
Codonopsis	Palpitations
Coenzyme Q10	Abnormal heart rhythms
Cordyceps	Arrhythmia (irregular heartbeat)
Creatine	Anti-arrhythmic
Danshen	Heart palpitations
Devil's claw	Antiarrhythmic
Dong quai	Abnormal heart rhythms
Fenugreek	Heart conditions
Garlic	Heart rhythm disorders
Ginseng	Palpitations
Goldenseal	Abnormal heart rhythms
Guarana	Heart conditions
Hawthorn	Cardiac arrhythmia
Heartsease	Heart disorders
Khella	Irregular heartbeat
Lavender	Decrease in heart rate
Lemon balm	Heart conditions
Lime	Heart palpitations
Lotus	Palpitations
Melatonin	Tachycardia
Mistletoe	Heart conditions
Neem	Cardiac arrhythmia (irregular heartbeat)
Oregano	Heart conditions (orally)
Pycnogenol	Cardiac mitral valve prolapse
Rhodiola	Abnormal heart rhythm (arrhythmia)
Rutin	Arrhythmia (cardiac rhythm abnormalities)
Selenium	Cardiac arrhythmia
Squill	Arrhythmia (abnormal heart rhythms)
Sweet woodruff	Heart disorders (regulating heart activity)
White horehound	Heart rate abnormalities