The Anoxia Test in the Diagnosis of Coronary Insufficiency

Pruitt, Raymond D.

doi:10.1001/jama.1945.02860290001001

Cited by 20 publications

(3 citation statements)

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“…There might also have been examples of lowered arterial oxygen levels in pre-operative resting patients as described by Lambertsen et al (1952) and Cole and Parkhouse (1961). In normal individuals breathing the same oxygen concentration a wide range in arterial oxygen levels occurs, as repeatedly shown by previous reporters (Barach et al, 1941;Pruitt, Burchell and Barnes, 1945;Houston, 1946;Dripps and Comroe, 1947).…”

Section: Discussionmentioning

confidence: 78%

Human Oxygenation by Air During Anaesthesia: The Relation of Ventilatory Volume and Arterial Oxygen Saturation

1963

British Journal of Anaesthesia

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Ventilation and arterial oxygen saturation have been measured in 18 patients during anaesthesia with ether or halothane carried in air. All patients were ventilated artificially with a Jefferson ventilator at a frequency of 16 breaths per minute and variable tidal volume. Ventilation has been expressed as a percentage of Radford's standard, Nunn's standard and the patient's pre-operative resting ventilation. 110 per cent of both Radford's and Nunn's standard ventilation and 98 per cent of the patient's own resting ventilation were found to yield a mean arterial oxygen saturation of 95 per cent. Below this the mean saturation fell sharply with decreasing ventilation. Cyanosis was never visible even with a saturation as low as 70 per cent, although desaturation was evident in the colour of the arterial blood when sampled.

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Section: Discussionmentioning

confidence: 78%

Human Oxygenation by Air During Anaesthesia: The Relation of Ventilatory Volume and Arterial Oxygen Saturation

1963

British Journal of Anaesthesia

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“…It is assumed that a marked S-T depression in 2 patients was associated with an attack of transient coronary insufficiency, precipitated by the meal. 6. Problems of applicability, standardization and physiologic background are discussed.…”

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confidence: 99%

The Meal Test in Clinical Electrocardiography

Simonson

McKinlay

1950

Circulation

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The fact theat all ordinary Illeal induces (definite Two criteria were used for differentiation bet\-een a normal and abnormal response of the electrocardiogram to a meal: the response wras considered to be abnormal (1) when, according to accepted standards,14 it was normal or borderline before the meal but abnormal after the meal;(2) when the changes exceeded the expectancy range for 98 per cent of the normal population.13In normal subjects it was found that the changes of CF4 or V4 were very similar,"3 so that the normal standards for V4 may also be applied for CF4.Patients. All patients were ambulatory and in a state of apparent compensation at the time of the test. Most of them were between 40 and 60 years of age. About half of the patients (45) were members of a large experimental group of 500 subjects presently under study of this Laboratory l5 In 29 patients, the electrocardiograms were the only abnormal (or borderline) findings of a thorough physiologic and clinical examination. Thus, the majority of our patients were in an incipient phase of cardiovascular degeneration, except a group of 23 patients with diagnosed corona'y insufficiency,.The patients were grouped into six major categories: (I) Suspected coronary insufficiency (16 pa-

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“…In the tracing of August 23, 1938, are seen changes associated with the healing stage of the same lesion. In the electrocardiogram of June8, 1948, the complexes are typical of left bundle-branch block. With the possible exception of the small Q in V 5 , there is no indication electrocardiographically of an old infarction.…”

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confidence: 99%