Direct intracardiac angiocardiography—Its diagnostic value

Chávez, Ignacio; Dorbecker, N; Celis, A

doi:10.1016/0002-8703(47)90076-8

Cited by 63 publications

(7 citation statements)

References 4 publications

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“…In the majority of laboratories, the sole use made of the results of the ventriculographic study (the film record) still consists of a simple visual inspection and differs little from that in the earliest reports (4)(5)(6). This includes, for example, an estimate of regurgitant flow in aortic and mitral valves, the shunt in septa1 defects, jet formation as a result of these lesions as well as an impression of the contour of contraction, and the identification of regions of hypo-or dyskinesis.…”

Section: Introductionmentioning

confidence: 99%

Quantification of Ventricular Performance: A Computer‐Based System for the Analysis of Angiographic Data

Brower

Meester²,

Hugenholtz³

1975

Cathet. Cardiovasc. Diagn.

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A computer-based quantitative angiography system for the acquisition and analysis of ventriculographic data has been developed. In addition to the apparatus normally required for angiography and left ventricular pressure recording, a digitizing tablet, PDP 11/20 mini computer, and TV monitor with a hard-copy device is employed. Four modes of operation are currently in use: data acquisition, analysis, mini cine, and data tape editor. Data acquisition facilitates forming a magnetic tape record of the digitized pressure, timing, and event identification, together with anywhere from 4 to 100 digitilized LV contours. A number of error checks and feedbacks are incorporated to provide some measure of quality control. In the event an error is written onto the magnetic tape record, the data tape editor can be used to review the record and correct most errors. Analysis of the generated data tape consists of several options which include: pump function, muscle function, pressure derived indices of contractility and systolic time intervals, and contour pattern recognition which is still under development. If the complete analysis option is chosen, a summary of the analysis, referred to as the quick-sight list, is also presented. The so called mini cine option employs a separate and independent acquisition-analysis program. This requires only the end-diastolic (with a segment of wall) and end-systolic contours (without pressure data) to extract the most essential parameters (EDV, EF, CI, HR, and wall mass). As a result of the relative straightforward processing and inherent simplicity, the mini cine option is most frequently used. This system has done much to reduce the time required for analysis of angiographic data, while at the same time maintaining and even improving the quality of the results. Other less tangible benefits include: the possibility to build a readily accessible library of patient data files facilitating a posteriori studies, precise and uniform definition of the rules to input and analyze data, and finally providing a useful step towards fully automatic ventriculographic processing.

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Section: Introductionmentioning

confidence: 99%

Quantification of Ventricular Performance: A Computer‐Based System for the Analysis of Angiographic Data

Brower

Meester²,

Hugenholtz³

1975

Cathet. Cardiovasc. Diagn.

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“…Ironically, this technique has resurfaced with computed tomographic and magnetic resonance angiography. Left ventriculography via injection of contrast medium into a right heart catheter was described a decade latter by Chávez et al [3] and Jönsson et al [4]. Catheterization of the left ventricle for hemodynamic assessment was described shortly after in 1950 by Zimmerman et al [5].…”

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confidence: 99%

Low‐volume left ventriculography: The heart of the matter is large or small

Grollman

2001

Cathet Cardio Intervent

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“…A catheter was inserted through the external jugular vein (5,10). The position of the catheter varied according to the anatomic structure to be outlined.…”

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confidence: 99%

Temporary Arrest of the Contrast Medium in Angiocardiography

Celis¹,

Cicero²,

Castillo³

et al. 1956

Acta Radiologica

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byAle jan d roO eli s, R a ul 0 ice r 0, Her milo Del 0 a still 0, and E n r i que Arc e G.If an opaque substance is injected into the superior vena cava above the azygos arch, it diffuses in the same direction as the blood flow. One of the most important causes for the direction of circulation within the thorax is the endothoracic negative pressure.The contrast medium during angiocardiography never flows towards the tributary veins of the superior vena cava (i. e. the azygos vein), because the negative endothoracic pressure opposes it. By making the pressure positive, however, the circulation of the blood may be then arrested. An angiocardiographic study under these circumstances offers an interesting picture of the dynamic phenomena occurring within the thorax. An easy way to produce positive values of the endothoracic pressure is by means of the Valsalva experiment (4).Review ot literature. In 1761 MORGAGNI quoted VALSALVA'S words: "If the glottis be closed after a deep inspiration, and a strenuous and prolonged expiratory effort be then made, such pressure can be exerted upon the heart and intrathoracic vessels that the movement of the blood is temporarily arrested." This fundamental physiologic explanation given by VALSALVA, remains unaltered.As early as 1894, CRIEGERN found that the cardiac outline became smaller during Valsalva's experiment, an observation verified by DIET-LIN in 1906 by fluoroscopic examination; a diminution amounting to 25 % of the cardiac area was observed. This same observation was again made much later by several authors (DAWSON 11).

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Direct intracardiac angiocardiography—Its diagnostic value

Cited by 63 publications

References 4 publications

Quantification of Ventricular Performance: A Computer‐Based System for the Analysis of Angiographic Data

Quantification of Ventricular Performance: A Computer‐Based System for the Analysis of Angiographic Data

Low‐volume left ventriculography: The heart of the matter is large or small

Temporary Arrest of the Contrast Medium in Angiocardiography

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