Lege Artis Medicinae

[Catheter ablation of supraventricular tachycardias]

KEMPLER Pál1, LITTMANN László2, TÓTH K. Zoltán3

AUGUST 31, 1994

Lege Artis Medicinae - 1994;4(08)

[Medical therapy for supraventricular arrhythmias is often ineffective. Arrhythmia surgery is limited by its considerable morbidity and cost. A better understanding of the exact anatomic-electrophysiologic correlations that govern supraventricular arrhythmogenesis and the advances in catheter ablative techniques have led to a new, effectual and costeffective therapy. Catheter ablation techniques result in a high rate of success rates and a low rate of complications. Radiofrequency ablation has become an accepted form of treatment for a variety of supraventricular arrhythmias. This review summarizes current data on catheter ablation of supraventricular arrhythmias.]

AFFILIATIONS

  1. Semmelweis Orvostudományi Egyetem III. Belklinika, Budapest
  2. Laser and Applied Technologies Laboratory Carolinas Heart Institute Charlotte, NC, USA
  3. Szent Imre Kórház V. Belosztály, Budapest

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[While the number of deaths from cervical cancer of women over the age of 45, has fallen in the recent years the mortality in women under the age of 35 has increased. The reason for this change is not clear. A large number of analytical studies tried to identify the risk factors for cervical cancer (age, marital status, time of first intercourse, number of sexual partners, coital frequencies, circumcision of partners, menstrual patterns, gravidity, type of contraception, smoking, viral infection, socioeconomic circumstances) but the real con nection between the disease and the varions risk factors remained unclear. The results of these studies suggest that, the 'one hit one tumor' hypothesis can't be proven, and it seems more appropriate to cousider a complex effect of these etiologic factors acting on the altered immunologic status of the cervix uteri. We tried to concentrate on one out of these factors from the literature which may play a cardinal role in the development of CIN or invasive cervix cancer. It is evident from the literature that the macrophages present in the cervix tissue in CIN, or infiltrating the tumor tissue in invasive cancer, could influence either the development of cervical cancer or the prognosis of the disease. It has long been known that in the cervical tissue there are a specific type of dentric cells taking part in the antigen presentation process. The examination of behavior, distribution and activity of these so – called Langerhans cells due to the exogen effect in the cervical tissue may be a which contributes to the understanding of the process leading to the development of CIN. ]

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[Our aim was to assess the frequency of cardiac side effects, primarily ischemic heart disease, in symptom-free patients with early breast cancer previously treated with radio therapy. Thirty-seven survivors of a previous randomized study of early breast cancer were examined. Twenty patients irradiated pre- or postoperatively for left-sided disease (study group patients) were compared with 17 controls who were either treated for right-sided disease, or were non-irradiated patients. Radiotherapy was randomized in the original study; either tangential field Co-, or electron-therapy was delivered. A bicycle ergometry stress test with 99m Tc Sesta MIBI myocardial perfusion scintigraphy was carried out and the patients' major risk factors for ischemic heart disease were also listed. Our results showed a significant difference between the scintigraphic findings of the two groups. Five of the 20 study group patients (25%), and none of the 17 controls exhibited some kind of significant defect on scintigraphy, indicating ischemic heart disease (p <0,05). Radiotherapy for left-sided breast cancer with the above-mentioned treatment technique may be an independent risk factor in the long-term development of ischemic heart disease. The need to optimize adjuvant radiotherapy for early breast cancer by considering the dose both to the heart as well as the cancer, is emphasized. ]

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