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Oxygen as a cause of blindness in premature infants: "autopsy" of a decade of errors in clinical epidemiologic research.

Several intellectual "autopsies" have recently reviewed errors in clinical epidemiologic studies of causation, such as the original claim that amyl nitrite "poppers" caused AIDS. The current autopsy was done to determine why it took more than a decade--1942 to 1954--to end an iatrogenic epidemic in which high-dose oxygen therapy led to retrolental fibroplasia (RLF) in premature infants, blinding about 10,000 of them. The autopsy revealed a museum of diverse intellectual pathology. When first noted, RLF was regarded as neither a new disease nor a postnatal effect. In early investigations, the o…

[Phonocardiographic and Doppler echocardiographic study on the mechanism of the presystolic murmur in mitral stenosis, especially the relationship to mitral inflow dynamics].

The cause of the "presystolic murmur" in mitral stenosis was investigated by phonocardiography and continuous wave Doppler echocardiography … atients with "presystolic murmur". 4. Five patients with newly developed "presystolic murmur" after amyl nitrite inhalation had an increased initial low frequency component of the first heart sound coinciding with the latter half of "presystolic murmur". The rate of increase in the peak flow velocity and the deceleration rate of the A wave were significantly l …

A systematic approach to the bedside differentiation of cardiac murmurs and abnormal sounds.

Fortified by knowledge gained from cardiac catheterization studies, a more precise physiologic approach to cardiac auscultation has evolved in recent years. This system involves observing changes in the characteristics of murmurs and abnormal sounds during respiration, the Valsalva maneuver, exercise, changes in posture, after pharmacologic agents and during arrhythmias, These techniques will aid in the accurate identification of the origin of the murmur or abnormal sound but do not necessarily indicate the presence or severity of cardiac disease. The auscultatory results must be interpreted i

[Mode of splitting of the second heart sound in patients with hypertrophic cardiomyopathy].

Mode of the splitting of the second heart sound ( IIs ) and left ventricular systolic time intervals (STIs) in patients (pts) with hypertrop … c findings. The pts with HOCM were classified as resting type (13 pts) and latent type (provoked by amyl nitrite: 4 pts) on the basis of the obstructive sign at rest. Mode of the splitting of the IIs : a) The pts with HCM showed a wide splitting of the IIs . The mean split interval during held expiration (IIA-IIP) was 41.0 +/- 9.9 msec. Twenty pts (67%) showed …

Химсекс как диагностическая задача: к признанию в ICD-12 и интегрированным подходам к лечению - ретроспективный обзор.

Химсекс — это явление, связанное с умышленным использованием психоактивных веществ перед или во время сексуальной активности, особенно среди мужчин, ведущих сексуальную жизнь с мужчинами (MSM). Оно связано с различными рисками для здоровья, включая зависимость от веществ, рискованные сексуальные действия и оба психические и somaticные расстройства. Несмотря на его растущую распространенность и значимость для общественного здоровья, химсекс не имеет четкого определения и не признан как отдельная диагностическая категория. Эта ретроспективная ревью синтезирует клинические, эпидемиологические и т

Совпадение в полном тексте источника
… nitrite” OR “PDE-5 inhibitors” OR “sildenafil” OR “tadalafil” OR “vardenafil” OR “Viagra” OR “Cialis” OR “Levitra” OR “1,4-butanediol” OR “BDO” OR “fentanyl” OR “opioids” OR “kratom” OR “Mitragyna speciosa” OR “sodium nitroprusside” OR “α-PVP” OR “flakka” OR “bath salts” OR “UR-144” OR “synthetic cannabinoids … Amyl nitrite (1–2 min) and butyl nitrite (up to 2 min) have the shortest effect, while isobutyl nitrite (2–3 min) has a slightly longer effect [ 54 ]. It is worth noting that poppers are often used concurrently with other psychoactive substances, which increases the risk of health complications. …

Pruritus in hemodialysis patients.

BackgroundPruritus is one of the most bothersome symptoms in patients on maintenance hemodialysis (HD), however little progress is seen in our understanding of its pathogenesis. The aim of this study was to evaluate the frequency of pruritus in HD patients in Tehran, Iran, and to correlate its presence and intensity with relevant clinical and laboratory parameters.MethodsOne hundred sixty-seven patients on maintenance HD at three out-patient HD units were enrolled in the study. Itch intensity was scored as mild, moderate and severe. Some relevant clinical and laboratory parameters (age, sex, x

Efficacy of phosphodiesterase type 5 inhibitors in univentricular congenital heart disease: the SV-INHIBITION study design.

AIMS: In univentricular hearts, selective lung vasodilators such as phosphodiesterase type 5 (PDE5) inhibitors would decrease pulmonary resistance and improve exercise tolerance. However, the level of evidence for the use of PDE5 inhibitors in patients with a single ventricle (SV) remains limited. We present the SV-INHIBITION study rationale, design, and methods. METHODS AND RESULTS: The SV-INHIBITION trial is a nationwide multicentre, randomized, double blind, placebo-controlled, Phase III study, aiming to evaluate the efficacy of sildenafil on the ventilatory efficiency during exercise, in

Scoping Review and Meta-Analysis Suggests that Cannabis Use May Reduce Cancer Risk in the United States.

Introduction:Cannabis smoke contains carcinogens similar to tobacco, in addition to compounds with antitumor activity. Cannabis use reduces the risk of obesity and cannabinoids inhibit chronic inflammation, known causes of cancer. The net effect of Cannabis use on cancer risk is not known. Objective: To examine the association between Cannabis use and cancer risk in the United States. Methods: Identify and analyze published data on cancer risk in Cannabis users. Results: A total of 55 data points, consisting of risk ratios of cancer in Cannabis users and nonusers, were identified from 34 studi

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