Electrocardiographic observations on 500 unselected young adults at work

Viscidi, Phillip C.; Geiger, Arthur J.

doi:10.1016/s0002-8703(43)90287-x

Cited by 22 publications

(4 citation statements)

References 3 publications

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“…It ranges from none (Shipley and Hallaran, 1936;Hoskin and Jonescu, 1940;and Larsen and Skulason, 1941), 1-8 (Viscidi and Geiger, 1943), aijd 3 per cent (Levitt, 1939;Chamberlain and Hay, 1939) to 6 per cent (Leach, Reid, and White, 1941), and 8 per cent (McFarland et al, 1939). A voltage of less than 0-8 mV was found in 30 per cent by McFarland et al (1939).…”

Section: Electrocardiographic Changes In Rheumatoid Arthritismentioning

confidence: 99%

The Heart in Rheumatoid Arthritis

Fischmann¹,

Gwynne²

1948

Heart

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Section: Electrocardiographic Changes In Rheumatoid Arthritismentioning

confidence: 99%

The Heart in Rheumatoid Arthritis

Fischmann¹,

Gwynne²

1948

Heart

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“…It ranges from none (Shipley and Hallaran, 1936;Hoskin and Jonescu, 1940;and Larsen and Skulason, 1941), [1][2][3][4][5][6][7][8] (Viscidi and Geiger, 1943), aijd 3 per cent (Levitt, 1939;Chamberlain and Hay, 1939) to 6 per cent (Leach, Reid, and White, 1941), and 8 per cent (McFarland et al, 1939). A voltage of less than 0-8 mV was found in 30 per cent by McFarland et al (1939).…”

Section: Electrocardiographic Changes In Rheumatoid Arthritismentioning

confidence: 99%

“…A voltage of less than 0-8 mV was found in 30 per cent by McFarland et al (1939). That age does not determine the occurrence of low voltage is suggested by the fact that both the Viscidi and Geiger (1943) and the McFarland (1939) groups consisted ofyoung, healthy airmen.…”

Section: Electrocardiographic Changes In Rheumatoid Arthritismentioning

confidence: 99%

The Heart in Rheumatoid Arthritis

1944

The Lancet

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“…This is not evidence that changes do not occur or that the malarial process is without effect on the heart. The normal limits of the several ECG items are so wide, and are extending with the accumulation of more extensive data (1,2), that definite and significant changes in an individual may occur without resulting in an ECG which by itself would be classified as abnormal. Obviously "before and after" studies are required.…”

mentioning

confidence: 99%

Experimental Malaria in Man. Iii. The Changes in the Electrocardiogram 1

Simonson¹,

Keys²

1950

J. Clin. Invest.

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Electrocardiograms (ECGs) taken from patients with malaria are usually within normal limits or show only minor non-specific deviations. This is not evidence that changes do not occur or that the malarial process is without effect on the heart. The normal limits of the several ECG items are so wide, and are extending with the accumulation of more extensive data (1, 2), that definite and significant changes in an individual may occur without resulting in an ECG which by itself would be classified as abnormal. Obviously "before and after" studies are required.The present report covers the ECG findings on 12 previously healthy young men before experimental blood-induced vivax malaria and on two occasions following the termination of the disease. Besides the usual resting ECG, the response of the ECG to the upright posture was studied. The subjects and conditions have been described in a previous paper (3). METHODSThe three standard limb leads were recorded after a rest of at least ten minutes in the supine position on the tilt-table, the subject being clamped by the hips using Mayerson's (4) arrangement. The table was then tilted to an angle of 680 and the ECG recordings were repeated during the first, fifth and tenth minute with the subject passively supported in this relatively upright position. All tests were made in the morning before breakfast Control studies made several months before malaria were compared with repetitions on the second day and again three weeks after termination of the malaria.The following ECG items were measured and analysed: Durations of P, QRS, P-R, and Q-T; the "constant" KQT (QT divided by the square root of R-R); the amplitudes in each lead of P, QRS, and T; the sums for the three leads of the amplitudes of QRS and of T ( 'sounds, the duration of mechanical systole was estimated (interval between first and second sounds), and K,,t was calculated as the quotient of this divided by the square root of the R-R interval. Since neither the QRS interval nor the amplitude or duration of P showed significant responses to malaria, they are not considered in the presentation of results below. RESULTS In supine restThe findings in standard (basal) rest are summarized in Table I. The majority of the electrocardiographic items showed some change when they were recorded on the second day following the termination of malaria and these changes were statistically significant at the 5 per cent level for the P-R interval (slightly lengthened), for the sum of the QRS potentials in the three leads (increased), for T2 (reduced but still positive), and for the angle of the QRS axis (small left axis shift). There was a more significant decline in the sum of the potentials of the T waves in the three leads (ET); the data indicate such a change could be expected by chance alone in less than one trial out of 100 (i.e., p. = 0.01).Three weeks after the termination of malaria some of the items had regressed toward the control but there were still some significant differences. The slight elevation of the heart rate ...

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Electrocardiographic observations on 500 unselected young adults at work

Cited by 22 publications

References 3 publications

The Heart in Rheumatoid Arthritis

The Heart in Rheumatoid Arthritis

The Heart in Rheumatoid Arthritis

Experimental Malaria in Man. Iii. The Changes in the Electrocardiogram 1

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