Electrode catheters and the diagnosis of Ebstein's anomaly of the tricuspid valve.

Watson, Hamish

doi:10.1136/hrt.28.2.161

Cited by 26 publications

(12 citation statements)

References 37 publications

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“…In 5 patients an intracardiac electrocardiogram was recorded with simultaneous pressures during withdrawal of the catheter from right ventricle to right atrium. Positive results for Ebstein's anomaly (Yim and Yu, 1958;Watson, 1966) were demonstrated in 3 patients (Cases 2, 5, and 6), but negative results (Moles, Jacoby, and McIntosh, 1964) were also obtained in these during some withdrawals. The remaining 2 patients (Cases 4 and 8) gave negative results, but the technique was employed only once in 1 subject and twice in the other.…”

Section: Cardiac Catheterizationmentioning

confidence: 92%

“…The diagnosis in a severe case should be readily apparent, and the presentation of a cyanosed subject with a "quiet" heart, tricuspid murmurs, a large globular cardiac shadow with pulmonary oligaemia on radiological examination, and a low voltage electrocardiogram with conduction defects, is now well recognized (Blount et al, 1957;Mayer, Nadas, and Ongley, 1957;Vacca, Bussmann, and Mudd, 1958;Schiebler et al, 1959;Sinha, Uricchio, and Goldberg, 1960). However, in milder forms of the malformation, often encountered in acyanotic adults, the diagnosis is less obvious (Blount et al, 1957;Watson, 1966).…”

Section: Cardiac Catheterizationmentioning

confidence: 99%

“…The electrode catheter is of value in the diagnosis of Ebstein's anomaly by continuing to record right ventricular potentials on the intracardiac electrocardiogram when the pressure tracing has changed to an atrial form. However, as emphasized by Watson (1966), a positive result should be regarded as confirmatory rather than diagnostic, since both false positive and false negative results may be obtained with this technique. SUMMARY Cases of mild Ebstein's anomaly are not so easily recognized as those with a more severe form of the condition.…”

Section: Radiological Electrocardiographic and Catheterization Findmentioning

confidence: 99%

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Mild Ebstein's anomaly.

Pocock¹,

Tucker²,

Barlow³

1969

Heart

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Section: Cardiac Catheterizationmentioning

confidence: 92%

Section: Cardiac Catheterizationmentioning

confidence: 99%

Section: Radiological Electrocardiographic and Catheterization Findmentioning

confidence: 99%

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Mild Ebstein's anomaly.

Pocock¹,

Tucker²,

Barlow³

1969

Heart

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“…6 where all the delta waves are negative. This transition from a positive to a negative delta wave in the region of the outlet from the displaced tricuspid valve indicates that the site of pre-excitation is somewhere between the true A-V annulus and the apex of the right ventricle, but it is too difficult to be certain of the position of the catheter tip-even with biplane screening (Watson, 1966)-to be more precise about its exact position in the right ventricular wall.…”

Section: Intracardiac Electrocardiogram In Type B Ventricular Pre-excmentioning

confidence: 99%

Intracavitary potentials in type B ventricular pre-excitation.

Watson¹,

Lowe²

1967

Heart

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In 1945, Rosenbaum and his associates proposed that ventricular pre-excitation should be classified into two types (A and B) according to the configuration of the QRS complexes in the right precordial leads of the scalar electrocardiogram. In type A pre-excitation the delta wave is positive and the S waves are small or absent; in type B the delta wave is negative and the S waves are large. Though somewhat arbitrary, in that occasional cases are difficult to classify because the delta wave and main deflection are of opposite polarity (Rosenbaum, 1957;Tranchesi et al., 1959), this classification has served a useful purpose by suggesting that there are two common sites from which premature excitation of the ventricles may occur, and its value has been broadly confirmed by subsequent vectorcardiographic studies.Bleifer et al. (1959), for example, showed in a series of 38 cases that the delta vectors and QRS sA loops in the horizontal plane fell into two groups that corresponded to Rosenbaum's types A and B. In group A, the delta wave was upright in both the right and left precordial scalar leads, and in the horizontal plane vectorcardiogram the delta vector and the QRS sA loops were orientated anteriorly between + 300 and + 1200. In group B, the delta wave was negative in the right precordial leads and the delta vector and QRS st loops were orientated to the left between -60°and + 30°in the horizontal plane. In general, the angle between the delta vector and the QRS sA loop was narrow, indicating that the delta wave appeared to determine the direction of the remaining portion of the QRS sA loop. Tranchesi et al. (1959) have also made a vectorial analysis, classifying 27 cases into types I and II, according to the orientation of the delta vector. In type I the delta wave was positive in V2 and the

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“…An intracardiac electrode catheter in this location detects a ventricular electrogram and an atrial pressure pulse. [3][4][5] In addition to these unique and diagnostically useful findings in the electrode catheter, patients with Ebstein's anomaly display a number of other electrocardiographic abnormalities (table 1).…”

mentioning

confidence: 99%

Electrophysiologic characteristics of Ebstein's anomaly of the tricuspid valve.

Kastor¹,

Goldreyer²,

Josephson³

et al. 1975

Circulation

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SUMMARYElectrophysiologic characteristics of five patients with Ebstein's anomaly of the tricuspid valve were defined with studies using luminal intracardiac electrode catheters. The diagnosis was made in each case from clinical data and confirmed at.cardiac catheterization by the presence of an atrialized right ventricular chamber with atrial mechanical activity and ventricular electrical activity. In three cases intra-right atrial conduction was prolonged (P-A intervals of 50, 50,

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Electrode catheters and the diagnosis of Ebstein's anomaly of the tricuspid valve.

Cited by 26 publications

References 37 publications

Mild Ebstein's anomaly.

Mild Ebstein's anomaly.

Intracavitary potentials in type B ventricular pre-excitation.

Electrophysiologic characteristics of Ebstein's anomaly of the tricuspid valve.

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