Biomedical subjects

M Clark

Publications and source records attributed to M Clark.

At least 343 records · Page 19Linked to original sources

PubMed1978

Battling hospital bugs.

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Cross Infection↗

PubMed1978

The new snake pits.

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Community Mental Health Services↗

PubMed1978

Too much surgery?

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Blue Cross Blue Shield Insurance Plans↗

PubMed1978

An assessment of carotid phonoangiography and oculoplethysmography in the detection of carotid artery stenosis.

Carotid phonoangiography (CPA) and oculophlethysmography (OPG) examinations for the detection of extracranial carotid occlusive disease were performed in 308 patients, 103 of whom underwent arch angiography. When correlated with angiographic findings, the overall accuracy of CPA/OPG was 86 per cent. There were 4 per cent false-positive 9.6 per cent false-negative results, and these were further analyzed. Significant carotid bruits demonstrated by CPA strongly suggested the presence of appreciable carotid stenosis. Noninvasive CPA/OPG is an excellent diagnostic tool in patients with non-hemispheric symptoms, in those with asymptomatic bruits, as a screening procedure in potential stroke victims, and for follow-up after cartotid endarterectomy. Caution is advised in relying on this and other noninvasive technics as the sole method for recommending angiography and operative treatment in symptomatic patients.

Adult↗

PubMed1978

Affect, accessibility of material in memory, and behavior: a cognitive loop?

Two studies investigated the effect of good mood on cognitive processes. In the first study, conducted in a shopping mall, a positive feeling state was induced by giving subjects a free gift, and good mood, thus induced, was found to improve subjects' evaluations of the performance and service records of products they owned. In the second study, in which affect was induced by having subjects win or lose a computer game in a laboratory setting, subjects who had won the game were found to be better able to recall positive material in memory. The results of the two studies are discussed in terms of the effect that feelings have on accessibility of cognitions. In addition, the nature of affect and the relationship between good mood and behavior (such as helping) are discussed in terms of this proposed cognitive process.

Affect↗

PubMed1978

Diagnosis of coronary artery disease by estimation of coronary sinus lactate.

In an attempt to assess the value of coronary sinus lactate estimation before and during atrial pacing for the diagnosis of obstructive coronary artery disease, 70 patients with angina were investigated in this way and by selective coronary arteriography. Thirty-five had radiologically normal coronary arteries and 35 had coronary artery disease. When the change in coronary arteriovenous lactate difference was less than 0.09 mmol/l (0.8 mg/100 ml) between the control and the peak atrial pacing sample, the coronary arteries were normal except in one patient who had distal disease of a single vessel. When the change was greater than 0.22 mmol/l (2.0 mg/100 ml) coronary artery disease was always found, and when the change was greater than 0.39 mmol/l (3.5 mg/100 ml) there was always disease of two or three vessels. Unfortunately, the presence or absence of coronary artery disease could not be predicted when the change fell between 0.09 and 0.22 mmol/l (0.8 and 2.0 mg/100 ml). Estimation of coronary sinus lactate before and during atrial pacing can thus frequently distinguish patients with normal coronary arteries from those with coronary artery disease.

Adult↗

PubMed1977