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Biomedical subjects

G Jackson

Publications and source records attributed to G Jackson.

At least 397 records · Page 22Linked to original sources

Unstable angina: a review and practical guide to management.

The syndrome of increasing angina leading to myocardial infarction was first recognised in the 1930s and the term unstable angina coined in 1971 by Fowler. Since then the importance of acute coronary syndromes as a presentation of ischaemic heart disease has been fully recognised. Recently several new pharmacological agents have been developed for the treatment of these syndromes. We aim to review the current treatments available for unstable angina and give a practical guide to its management.

Adrenergic beta-Antagonists↗

Erectile dysfunction and cardiovascular disease.

Patients with cardiovascular disease are at increased risk of developing erectile dysfunction (ED). This may be a consequence of atherosclerosis of the penile arteries, a reduced cardiac output, or a side-effect of drugs used to reduce cardiovascular risk factors (particularly beta-blockers, thiazide diuretics and, occasionally, lipid-lowering drugs). ED is a distressing condition, which often diminishes the patient's self-esteem, with the potential for damage to his psychological health and his relationship with his partner and family. When treating ED, the underlying aetiology should be established by careful examination and consideration of medical history and concurrent medication. Until recently, pharmacological treatment options involved intracavernous injections (alprostadil or moxisylyte) or intraurethral alprostadil. These treatments are often inconvenient and not well accepted by the patient. The recent introduction of oral sildenafil promises to revolutionise the treatment of ED. In double-blind, placebo-controlled trials in patients with ED, sildenafil improved erectile function and quality of life and was well tolerated. ED is a clinically important complication of cardiovascular disease and should be asked about and treated accordingly. It is important that effective treatments, including sildenafil, should be available for treating patients with cardiovascular disease and ED.

Coronary Disease↗

Smoking cessation: a consensus statement with special reference to primary care.

Nicotine addiction is a serious medical condition that needs to be treated like any other chronic disease. Primary care must play a key role in smoking cessation and offering help should be a routine part of primary care practice. As the most frequent opportunity for intervention lies within primary care, GPs should ensure that they raise the issue of stopping smoking at least annually with their smoking patients. When the smoker is ready to stop, the initial personal involvement of the GP is likely to increase the chance of a successful quit attempt. Follow-up may be with another healthcare professional. The support of healthcare professionals for the smoker who is motivated to quit, combined with appropriate pharmacotherapy, can substantially increase the chances of a successful quit attempt. Secondary care staff should also make every effort to help people to stop smoking and should communicate effectively with primary care--opportunities during hospitalisation are frequently missed. Specialist smoking cessation clinics have an essential role in providing more intensive specialist treatment and the expertise to partner and support the primary care effort. Smoking cessation is one of the most cost-effective healthcare interventions that can be made.

Family Practice↗

Reimplantation injury after lung transplantation in a rat model.

Distant procurement of organs for transplantation requires satisfactory preservation to reduce injury during ischemia and the initial phase of reperfusion. We have studied the mechanism of reimplantation injury after unilateral lung transplantation in isogeneic Fisher rats. The heart and lungs were removed en bloc from donor rats and preserved at 4 degrees C. After 5 hours the left lung was transplanted into a recipient. Radiographic and histologic evidence of pulmonary edema in the transplanted lung at 24 hours confirmed the presence of lung vascular injury. In five rats we performed bronchoalveolar lavage (BAL) of both nontransplanted and transplanted lungs at 24 hours posttransplant, immediately after the animal was killed. Results were compared with five normal control lungs. The results showed not only significantly greater number of cells from transplanted lungs compared with nontransplanted and control lungs but cell profiles showed much greater percentages of neutrophils (mean +/- SD) from transplanted (76.8% +/- 13%) compared with nontransplanted (2.8% +/- 3.1%) or control (0.8% +/- 0.8%) lungs. In seven other rats we measured BAL neutrophil activity with stimulated luminol chemoluminescence from transplanted left and nontransplanted right lungs 24 hours after unilateral left lung transplantation. Results (expressed as millivolt X 10(3) neutrophil +/- SD) showed significantly greater activity from transplanted (2.8 +/- 1.7) compared with nontransplanted (0.72 +/- 0.6) lungs. Reimplantation injury of the lung is characterized by pulmonary sequestration of neutrophils, and these cells may play a primary role in mediating vascular damage.

Animals↗

Unstable angina: early and late results of operative treatment.

Between January 1978 and May 1980 at King's College Hospital 68 patients of 300 patients treated consecutively by coronary artery bypass grafting (CABG) had presented with unstable angina. There were 58 males and 10 females age range 26 to 69 years, mean 54 years. Thirty-one patients (45%) had definite evidence of previous myocardial infarction, 4 had diabetes mellitus and 7 had left main stem stenosis greater than 50%. Seven cases (9.7%) required pre or peri-operative intra-aortic balloon pump assistance. Two subsets within this group of 68 patients with unstable angina were recognised. Fifty seven patients had CABG alone without any additional surgical procedure and there were 2 peri-operative deaths (mortality 3.5%). In 11 patients who had CABG plus additional surgical procedures including valve replacement or left ventricular aneurysmectomy there were 3 peri-operative deaths (mortality 27%). The overall mortality of the 68 patients was 5 deaths (7.4%). These results indicate that the operative mortality in patients with unstable angina having CABG alone is not significantly higher than the overall mortality at that time for the patients who had CABG for stable angina (2.4%).

Adult↗

The betrayers.

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History, 20th Century↗