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IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
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Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...
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Mitral Stenosis III: Medical Management01:26

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Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
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Aortic Regurgitation III: Medical Management01:25

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Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Varicose Veins II: Diagnostic Studies and Interprofessional Care01:26

Varicose Veins II: Diagnostic Studies and Interprofessional Care

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Varicose veins, or varicosities, develop when the valves in the veins, which control blood flow, weaken or damage. It causes blood to pool and the veins to enlarge. Understanding the clinical manifestations, diagnostic approaches, and management options for varicose veins is crucial for effective treatment and relief.Clinical manifestationsClinical manifestations of varicose veins include a heavy, achy feeling or pain after prolonged standing or sitting. This discomfort can often be relieved by...
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The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
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对冠状动脉玛辐射疗法的疗效进行序列静脉超声波评估,以预防非常长,扩散的,静脉静脉静脉病变的复发.

J M Ahmed1, G S Mintz, R Waksman

  • 1Intravascular Ultrasound Imaging and Cardiac Catheterization Laboratories, Cardiovascular Research Institute, Washington Hospital Center, Washington, DC 20010, USA.

Circulation
|August 22, 2001
PubMed
概括

冠状动脉马辐射可以有效地治疗静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉 较高剂量 (18 Gy) 与标准剂量相比,在长期,扩散性病变中预防新极端增生症方面表现出优异的结果.

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科学领域:

  • 心脏病学 心脏病学
  • 干预心脏病学 干预心脏病学
  • 医疗成像医学成像

背景情况:

  • 冠状动脉马辐射对于预防静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉静脉.
  • 在非常长的,扩散的ISR病变中,支臂疗法可能具有有限的疗效.
  • 血管内超声波 (IVUS) 是评估ISR的一个关键成像模式.

研究的目的:

  • 为了评估更高剂量的玛辐射对长期治疗的疗效,扩散ISR.
  • 为了比较标准剂量与高剂量马辐射在预防新极度增生症方面的有效性.

主要方法:

  • 连续的血管内超声波 (IVUS) 用于评估长期,扩散ISR (36-80毫米) 的患者.
  • 患者被纳入长 WRIST 试验 (15 Gy 马辐射) 或 HD 长 WRIST 注册表 (18 Gy).
  • 支架,光膜和内脏增生都以2毫米的间隔进行测量.

主要成果:

  • 随访时的最小光线面积在高剂量 (HD) 长 WRIST 组 (4.0+/-1.4 mm2) 中最大.
  • 长WRIST组中被辐射的患者的最小光线面积为2.9+/-1.0mm2.
  • 长 WRIST 组中的安慰剂患者具有最小的最小光线面积 (1.9+/-1.1 mm2).

结论:

  • 马辐射可以减少长期,扩散的ISR病变中的新极度增生.
  • 高剂量的玛辐射 (18 Gy) 对这些病变比标准剂量更有效.