J Clin Sleep Med. 2013 Aug 15;9(8):781-7. doi: 10.5664/jcsm.2920. Prevalence and Risk Factors of Sleep Disordered Breathing in Patients with Rheumatic valvular Heart Disease. Ding N, Ni BQ, Zhang XL, Huang HP, Su M, Zhang SJ, Wang H. Department of Respiratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China. STUDY OBJECTIVES: Sleep disordered breathing (SDB) is common in patients with chronic heart failure secondary to non-valvular heart disease; however, the prevalence and characteristics of SDB in patients with rheumatic valvular heart disease (RVHD) are unclear. This study was designed to determine the prevalence, characteristics, and risk factors for SDB in RVHD patients. METHODS: A cross-sectional study was conducted in 260 RVHD patients. The following data were recorded: types of heart valve lesions, electrocardiographic, echocardiographic, arterial blood gas analysis findings, baseline medication, 6-minute walk test (6MWT) distance, and sleep parameters. RESULTS: Compared to patients with single leftsided valve lesions, patients with left- and rightsided valve lesions had a higher prevalence of SDB (46.2% vs. 31.2%, p = 0.013); the increased prevalence of SDB only involved central sleep apnea (CSA) (31.1% vs. 14.1%, p = 0.001). Patients with obstructive sleep apnea (OSA) or CSA were older and had a shorter 6MWT distance, lower left ventricle ejection fraction and PaO2, a longer lung-to-finger circulation time, and a higher prevalence of atrial fibrillation (AF) and hypertension (all p < 0.05) as compared with patients without SDB. Multinomial logistic regression analysis showed that PaO2 ≤ 85 mm Hg was the only risk factor for OSA. Male gender, AF, 6MWT distance ≤ 300 m, PaO2 ≤ 85 mmHg, and PaCO2 ≤ 40 mm Hg were risk factors for CSA. CONCLUSIONS: Patients with RVHD had a high prevalence of SDB (predominantly CSA). RVHD patients with SDB, particularly those who had CSA, manifested more severe symptoms and greater impairment of cardiac function. Assessments of clinical manifestations of cardiac dysfunction may be important for predicting the risk factors for SDB. CITATION: Ding N; Ni BQ; Zhang XL; Huang HP; Su M; Zhang SL; Wang H. Prevalence and risk factors of sleep disordered breathing in patients with rheumatic valvular heart disease. J Clin Sleep Med 2013;9(8):781-787.
Πέμπτη, 22 Αυγούστου 2013
Patients with RVHD had a high prevalence of SDB (predominantly CSA). RVHD patients with SDB, particularly those who had CSA, manifested more severe symptoms and greater impairment of cardiac function. Assessments of clinical manifestations of cardiac dysfunction may be important for predicting the risk factors for SDB.
Modern challenged parts of the oath:
- To teach medicine to the sons of my teacher. In the past, medical schools gave preferential consideration to the children of physicians.
- To practice and prescribe to the best of my ability for the good of my patients, and to try to avoid harming them. This beneficial intention is the purpose of the physician. However, this item is still invoked in the modern discussions of euthanasia.
- I will not give a lethal drug to anyone if I am asked, nor will I advise such a plan. Physician organizations in most countries have strongly denounced physician participation in legal executions. However, in a small number of cases, most notably the U.S. states of Oregon, Washington,Montana, and in the Kingdom of the Netherlands, a doctor can prescribe euthanasia with the patient's consent.
- Similarly, I will not give a woman a pessary to cause an abortion. Since the legalization of abortion in many countries, the inclusion of the anti-abortion sentence of the Hippocratic oath has been a source of contention.
- To avoid violating the morals of my community. Many licensing agencies will revoke a physician's license for offending the morals of the community ("moral turpitude").
- I will not cut for stone, even for patients in whom the disease is manifest; I will leave this operation to be performed by practitioners, specialists in this art. The "stones" referred to are kidney stones or bladder stones, removal of which was judged too menial for physicians, and therefore was left for barbers (the forerunners of modern surgeons). Surgery was not recognized as a specialty at that time. This sentence is now interpreted as acknowledging that it is impossible for any single physician to maintain expertise in all areas. It also highlights the different historical origins of the surgeon and the physician.
- To keep the good of the patient as the highest priority. There may be other conflicting 'good purposes,' such as community welfare, conserving economic resources, supporting the criminal justice system, or simply making money for the physician or his employer that provide recurring challenges to physicians