What does "cardiac class three" mean?
Class III heart function typically refers to third-degree heart failure, in which the patient's physical activity is significantly limited. The details are as follows:
In clinical practice, heart function is generally classified into four grades. In Class I heart failure, patients usually have no limitation on their physical activity. In Class II, physical activity is slightly restricted; patients generally do not exhibit obvious symptoms at rest, but may experience palpitations, fatigue, and shortness of breath during physical exertion. In Class III, physical activity is markedly limited—for example, symptoms such as chest tightness, shortness of breath, and dyspnea may occur even while walking. Patients with Class IV heart failure are typically unable to perform any physical activity and may exhibit signs of heart failure even at rest.
Treatment for Class III heart failure may include medications such as digoxin injection, strophanthin K injection, and deslanoside injection, used under a physician's guidance. If medication proves ineffective, surgical interventions may be required, including valve replacement, percutaneous coronary angioplasty, or coronary artery bypass grafting, to improve cardiac function.