ISSN:0098-6569    

DOI:10.1002/ccd.1810110102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractIn this study, we compared stenosis severity by quantitative coronary angiography from video and cine images with visual estimation in 14 patients, who underwent PTCA. Both cine and video analysis demonstrated a change from 65.2 ± 2.5 to 36.5 ± 3.1% diameter stenosis following PTCA, whereas visual estimation (average of three observers) showed improvement from 89.9 ± 1.7 to 36.0 ± 3.2%. Percent area stenosis from quantitative angiography showed improvement from 87.9 ± 1.8 to 56.4 ± 5.8. These data indicate that visual assessment overestimated percent diameter of severe lesions. To determine if video analysis could provide rapid quantitative assessment of PTCA results, we compared percent diameter and percent area stenosis by video with cine (diameter: correlation coefficient, 0.82; slope, 0.79; area: correlation coefficient, 0.86; slope, 0.83). These results indicate that video‐based measurements are not different from cine‐derived measurements. Quantitative coronary angiography provides an accurate estimate of changes produced by PTCA and can be performed rapidly and accurately on video images, thus making results available during the PTCA

ISSN:0098-6569    

DOI:10.1002/ccd.1810110103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractSelective coronary angiograms were obtained using a real‐time high‐pass temporal filtration digital subtraction technique with videotape storage and display and compared to simultaneously recorded 35‐mm cineangiograms for 32 stenotic lesions in 15 patients. Both methods were evaluated by three independent observers using caliper measurement of percent diameter reduction for each lesion. There was a good correlation between the two imaging methods for individual observers, though considerable variability was seen, r = .73, standard error of estimate (SEE) = 9.1%. The average severity of stenosis and the interobserver variability were similar between methods. This digital subtraction technique for selective coronary angiography compares favorably with a conventional film‐based technique for evaluation of coronary stenoses and offers advantages of real‐time image processing, limited tolerance to patient motion, and relatively small digital memory requirements. In addition to further improvements in image quality, more objective computer‐aided scoring methods are needed to reduce the variability in lesi

ISSN:0098-6569    

DOI:10.1002/ccd.1810110104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractThe thermal dilution technique and its suitability for automatic computation of left ventricular volumes were evaluated on 28 anaesthetized dogs. The end‐diastolic volume (EDV) was computed from ventricular washout curves in two ways, first utilizing the ratio between the indicator amount and its peak concentration (first ejection method); and secondly the ratio between stroke volume and ejection fraction with the latter obtained by subtracting the residual fraction from 1.0. The residual fraction was determined as the mean of ratios between successive steps of four ventricular ejections on the downslope of the curve (downslope method). The linear correlation coefficient between the EDV determinations (n = 366) was 0.926, and slope y = 1.14 × + 0.5 ml with 4.6 ml as standard error of estimate. The first ejection method gave on average 15% higher EDV values than the downslope method. When heart rate was increased by pacing from 88 to 240/min, both methods showed a reduction of the EDV, but the downslope method to a greater degree. When after load was increased but heart rate decreased by phenylephrine, the first ejection method but not the downslope method indicated an increase in EDV. Otherwise, when pronounced tachy‐ or bradycardia were avoided, ventricular volumes yielded by the two methods were comparable. Indicator injection did not substantially affect ventricular pressure dynamics. The first ejection method seems to be a simple means for repeated measurements of EDV even in the case of diseased he

ISSN:0098-6569    

DOI:10.1002/ccd.1810110105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractSymptomatic coronary artery dissection is a recognized complication of coronary angioplasty that is usually associated with immediate adverse consequences. In contrast, the asymptomatic angiographic finding of an “intimal tear” following otherwise successful angioplasty has been considered clinically unimportant. A case is reported of a primarily successful coronary angioplasty with intimal tear that progressed to occlusive coronary artery dissection requiring coronary bypass surgery at 4 weeks postangioplasty. This case demonstrates that an asymptomatic intimal tear following successful coronary angioplasty is not always an innocuous angiographic find

ISSN:0098-6569    

DOI:10.1002/ccd.1810110106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractThis report describes successful results from intracoronary streptokinase administered beginning 6 hr after onset of symptoms to a 32‐year‐old male with subtotal vessel occlusion by thrombus. Coronary angiography 26 days later demonstrated normal vessels. We conclude that 1) duration of symptoms beyond 3–4 hr should not preclude the use of thrombolytic therapy in evolving myocardial infarction, 2) this patient exemplifies the higher incidence of subsequently demonstrated normal coronary arteries in patients under age 35 with acute myocardial infarction; arterial spasm and platelet aggregation are the most likely causes of coronary occlusion in these pat

ISSN:0098-6569    

DOI:10.1002/ccd.1810110107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractIn this report we present a case of a 30‐year‐old female patient with a single coronary artery, which consisted of a right coronary artery from which there was an anomalous origin of the left circumflex coronary artery. There was no left anterior descending coronary artery. The clinical and other noninvasive diagnostic features of this rare angiographic variant are described and compared to other known varieties of coronary anomalies. The absence of objective evidence of ischemia or left ventricular functional impairment and analysis of the angiographic data suggest that this is another benign variant of coronary anat

ISSN:0098-6569    

DOI:10.1002/ccd.1810110108

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractA 3‐month‐old infant is presented who developed acute superior vena caval obstruction after atrial surgery for transposition of the great arteries. Balloon dilation angioplasty resulted in a decrease in caval‐atrial gradient. The application of balloon angioplasty in this setting is disc

ISSN:0098-6569    

DOI:10.1002/ccd.1810110109

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractAn unusual case of a young woman with sarcoidosis and pulmonary hypertension who developed new bilateral continuous murmurs and was found to have peripheral pulmonary artery stenoses is reported. The patient has improved symptomatically, radiographically, and hemodynamically on steroid therapy.

ISSN:0098-6569    

DOI:10.1002/ccd.1810110110

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY

摘要:

AbstractComplete or partial absence of the pericardium is a relatively rare disorder. While physical examination, electrocardiogram, and chest x‐ray may suggest the diagnosis, definitive noninvasive diagnosis has until recently not been possible. In the patient described in the present report, the basis for chest pain initially attributed to myocardial ischemia was established noninvasively by computed tomographic examination of the chest to be congenital absence of the left pericardium. Experience with this patient emphasizes the fact that one of the known bases for nonischemic chest pain—congenital pericardial defects—can be precisely defined by contrast‐negative computed tomographic

ISSN:0098-6569    

DOI:10.1002/ccd.1810110111

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1985

数据来源: WILEY