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Biomedical subjects

M Maxwell

Publications and source records attributed to M Maxwell.

At least 91 records · Page 5Linked to original sources
PubMed1981

The effect of weight reduction on blood pressure, plasma renin activity, and plasma aldosterone levels in obese patients.

We investigated the relation between changes in the renin-aldosterone axis and reduction in blood pressure in 25 obese patients placed on a 12-week reducing diet; sodium intake was either medium (120 mmol) or low (40 mmol). Plasma renin activity (PRA) declined with weight loss, so that by 12 weeks there was a significant decrease in PRA (P less than 0.01) as well as plasma aldosterone (P less than 0.05), regardless of sodium intake. Weight loss with low sodium intake was equal to that with medium intake. The reduction in PRA but not in aldosterone correlated with weight loss in both sodium-intake groups (r = 0.58). Mean arterial pressure fell significantly and equally in both groups, correlating with weight loss throughout the study (r = 0.56) and with PRA from the fourth through 12th weeks (r = 0.48) These results demonstrate that weight loss is accompanied by reductions in PRA and aldosterone; PRA reductions, irrespective of sodium intake, may contribute to the decline in blood pressure.

Adult↗
PubMed1979

Comparative trial of manual and mechanical percussion technique with gravity-assisted bronchial drainage in patients with cystic fibrosis.

Chest physiotherapy still remains one of the most important aspects in the treatment of chest complications of cystic fibrosis. A mechanical device that allows the patient with cystic fibrosis to do his own chest physiotherapy will be of great benefit if it is as effective as manual percussion. 14 patients with cystic fibrosis using mechanical and manual percussion physiotherapy were studied by measuring sputum volumes, and FEV and FVC. Results with mechanical percussor were as good as with the manual percussor and, therefore, it would be reasonable for the older patient to use the former on his own.

Adolescent↗
PubMed1978

Electrocardiographic manifestations and clinical significance of atrioventricular nodal alternating Wenckbach periods.

Atrioventricular nodal alternating Wenckebach periods were defined as episodes of 2:1 atrioventricular block in which there was a gradual increase in transmission intervals of conducted beats ending in two or three consecutively blocked atrial impulses. This is one of the mechanisms whereby 2:1 atrioventricular block progresses into 3:1 or 4:1 atrioventricular block. Alternating Wenckebach periods appear during rapid atrial pac,ng (even in the absence of depressed atrioventricular nodal function), provided that the atria can be captured at a rate fast enough to allow for the occurrence of this phenomenon. Treatment of atrial flutter with digoxin and quinidine produces alternating Wenckebach's periods, with associated electrocardiographic changes specific for the type of drug given. In patients with "atrial tachycardia with atrioventricular block" due to digitalis intoxication or with primary disease of the conducting system or with acute myocardial infarction, there are coexisting severe arrhythmias and clinical symptoms requiring almost immediate pharmacologic or electrical therapy. We conclude that atrioventricular nodal alternating Wenckebach's periods are common and frequentyly transient and that they occur in a variety of clinical conditions, most of which are benign; however, contrary to what is commonly accepted, some episodes appear in clinical settings requiring prompt pharmacologic or electrical treatment.

Acute Disease↗
PubMed1978

Somatapsychology.

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Attitude to Health↗