摘要:

AbstractA simplified formula (cardiac output/[transvalvular pressure gradient]1/2) has been proposed as an alternative to the Gorlin equation for determining valve area in patients with mitral stenosis. This study was done (a) to assess the relationship between the results of the simplified formula and those of the Gorlin equation in patients with mitral stenosis and (b) to determine the clinical characteristics most likely to be associated with a disparity between the 2 formulae. In 96 patients with mitral stenosis, the disparity between the 2 formulae was>0.2 cm2in 43 (45%) and ≥ 0.35 cm2in 21 (22%). The results of the simplified formula were especially likely to be disparate from those of the Gorlin equation in those whose heart rates were>100 beats/minute. Thus, in the patient with mitral stenosis, the simplified formula should be used with caution and cognizance of its potential inaccuracy, particularly if the patient is tachycardi

ISSN:0098-6569    

DOI:10.1002/ccd.1810230202

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

年代:1991

数据来源: WILEY

摘要:

AbstractTo determine whether or not a new 3 cm long angioplasty balloon was more effective in treatment of long (15–25 mm) or tandem (<25 mm overall length) coronary lesions, 44 consecutive patients with suitable lesions were alternately assigned to treatment with shorter, standard, 2 cm length, or long, 3 cm balloons. Primary success of PTCA was achieved in 95%. Those treated with long balloons required fewer inflations (3.3 ± 1.5 vs. 5.7 ± 2.1,P=0001) and showed fewer moderate or severe intimal dissections of the lesions (4/22 vs. 12/22, p =.028.) The use of 3cm PTCA balloons in long or tandem lesions appears to be efficacious and less likely to cause dissections than shorter, 2 cm length devi

ISSN:0098-6569    

DOI:10.1002/ccd.1810230203

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

年代:1991

数据来源: WILEY

摘要:

AbstractEven with aspirin and heparin therapy, thrombus present prior to or forming after percutaneous transluminal coronary angioplasty (PTCA) results in significant complications. We report on 33 patients who were treated with continuous infusion of Urokinase through an intracoronary perfusion wire for 24 hr because of visible intracoronary thrombus. Seventeen native vessels (9 pre‐PTCA and 8 post‐PTCA) and sixteen saphenous vein grafts (12 pre‐PTCA and 4 post‐PTCA) were treated. All vessels were patent at the time of perfusion wire placement. Complete thrombus resolution, successful PTCA and sustained patency was seen in 31 of 33 patients. One native vessel treated post PTCA (originally occluded) re‐occluded. One saphenous vein graft treated prior to PTCA showed improvement in thrombus but distal embolization with balloon inflation occurred. No significant complications related to the intracoronary infusion technique were observed.In conclusion, rapid lysis of intra‐coronary thrombus can be accomplish safely using this technique and can result in improved P

ISSN:0098-6569    

DOI:10.1002/ccd.1810230204

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

年代:1991

数据来源: WILEY

摘要:

AbstractCoronary angioplasty (PTCA) was performed with specially constructed 6‐French guiding catheters with an internal lumen of 0.051 inches. In 154 patients these guiding catheters were used in a variety of configurations in conjunction with miniature balloon‐on‐a‐wire dilatation catheters in 1.5 to 3.5 mm sizes to perform PTCA.Overall patient success was 94%. PTCA was attempted in 24 totally occluded arteries with a success rate of 83% and 174 stenoses with a success rate of 97%. 6 French guiding catheters can be used to successfully perfo

ISSN:0098-6569    

DOI:10.1002/ccd.1810230205

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

年代:1991

数据来源: WILEY

摘要:

AbstractPrevious reports have suggested that pain associated with the injection of lidocaine is related to the acidic pH of the solution. To determine if the addition of a buffering solution to adjust the pH of lidocaine into the physiologic range would reduce pain during injection, we performed a blinded randomized study in patients undergoing cardiac catheterization. Twenty patients were asked to quantify the severity of pain after receiving standard lidocaine in one femoral area and buffered lidocaine in the opposite femoral area. The mean pain score for buffered lidocaine was significantly lower than the mean score for standard lidocaine (2.7 ± 1.9 vs. 3.8 ± 2.2,P=0.03). The pH adjustment of standard lidocaine can be accomplished easily in the catheterization laboratory before injection and results in a reduction of the pain occuring during the infiltration of tissue

ISSN:0098-6569    

DOI:10.1002/ccd.1810230206

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

年代:1991

数据来源: WILEY

摘要:

AbstractCoronary arteriography is described in a patient with dextrocardia and situs inversus totalis. Six cases of coronary arteriography in dextrocardia were reviewed from the literature, and 3 other cases were reported from the authors' institutions. In 9 of the 10 patients, coronary arteriography was performed without difficulty using standard Judkins or Sones catheters. Angiographers encountering patients with dextrocardia may use standard coronary arteriographic techniques with a few subtle modifications.

ISSN:0098-6569    

DOI:10.1002/ccd.1810230207

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

年代:1991

数据来源: WILEY

摘要:

AbstractCoronary spasm and intimal dissection are well‐known complications of coronary angioplasty with potentially serious consequences. Their treatments are different and need to be instituted quickly to prevent vessel closure. We report two cases of mechanical deformation caused by the angioplasty hardware masquerading as dissection or spasm during coronary angioplasty of tortuous native right coronary arterie

ISSN:0098-6569    

DOI:10.1002/ccd.1810230208

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

年代:1991

数据来源: WILEY

摘要:

AbstractThe contour of the epicardial coronary vessels may change considerably during coronary angioplasty. We report the extreme and unique „accordion‐like”︁ wrinkling of the mid right coronary artery as a result of distal guidewire entrapment during coronary angioplasty. Recognition of this artifact and its treatment may prevent further complications of coronary angi

ISSN:0098-6569    

DOI:10.1002/ccd.1810230209

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

年代:1991

数据来源: WILEY

摘要:

AbstractAccelerated coronary ostial stenosis is an infrequent late complication of coronary artery catheter instrumentation during aortic valve surgery, PTCA, or coronary angiography. We report the first case of bilateral coronary artery ostial stenoses developing after cardiac catheterization and right coronary artery PTCA. In patients with worsening angina following cardiac catheterization or PTCA, accelerated ostial stenoses should not be overlooked in the differential diagnosis.

ISSN:0098-6569    

DOI:10.1002/ccd.1810230210

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

年代:1991

数据来源: WILEY

摘要:

AbstractA patient with chest pain of recent onset, suggestive for angina pectoris, was referred for diagnostic coronary angiography, which showed the typical phenomenon of „slow dye progression”︁ in the absence of any significant coronary artery stenosis. While intracoronary Doppler measurements confirmed the extremely slow blood flow velocity, the coronary flow reserve and the calculated coronary blood flow proved to be within normal range.The present findings suggest that, in contrast with a previous hypothesis, the phenomenon of slow dye progression may not always be due to a microvascular cause. Epicardial artery disease, as suggested by the marked coronary artery ectasia, may be linked to the slow dye progression and predispose to coronary artery throm

ISSN:0098-6569    

DOI:10.1002/ccd.1810230211

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

年代:1991

数据来源: WILEY