Percutaneous mechanical mitral commissurotomy with a newly designed metallic valvulotome: immediate results of the initial experience in 153 patients.

BACKGROUND: Percutaneous balloon valvotomy has become a common treatment of mitral stenosis, but the cost of the procedure remains a limitation in countries with restricted financial resources, leading to a frequent reuse of the disposable catheters. To overcome this limitation, a reusable metallic valvotomy device has been developed with the goals of both improving the mitral valvotomy results and decreasing the cost of the procedure. METHODS AND RESULTS: The device consists of a detachable metallic cylinder with 2 articulated bars screwed onto the distal end of a disposable catheter whose proximal end is connected to an activating pliers. By the transseptal route, the device is advanced across the valve over a traction guidewire. Squeezing the pliers opens the bars up to a maximum extent of 40 mm. The clinical experience consisted of 153 patients with a broad spectrum of mitral valve deformities. The procedure was successful in 92% of cases and resulted in a significant increase in mitral valve area, from 0.95+/-0.2 to 2. 16+/-0.4 cm2. No increase in mitral regurgitation was noted in 80% of cases. Bilateral splitting of the commissures was observed in 87%. Complications were 2 cases of severe mitral regurgitation (1 requiring surgery), 1 pericardial tamponade, and 1 transient cerebrovascular embolic event. In this series, the maximum number of consecutive patients treated with the same device was 35. CONCLUSIONS: The results obtained with this new device are encouraging and at least comparable to those of current balloon techniques. Multiple uses after sterilization should markedly decrease the procedural cost, a major advantage in countries with limited resources and high incidence of mitral stenosis.

[Detection of acute rejection of heart transplantation by Doppler color imaging]. / Détection du rejet aigu myocardique après transplantation cardiaque par Doppler couleur tissulaire.

Doppler tissue imaging is a new technique of measuring the velocities of myocardial wall motion. In order to assess its value in the diagnosis of acute rejection, the velocities of the interventricular septum and left ventricular posterior wall were measured in systole and early diastole in 34 cardiac transplant patients at the time of their endomyocardial biopsy, using an M mode left parasternal short axis view. During 40 episodes of acute rejection (26 mild and/or moderate, 10 sub-severe and 4 severe), the wall velocities decreased significantly (p < 0.001) both in the interventricular septum and endocardium of the posterior wall. Myocardial velocities were significantly slower in sub-severe or severe rejection than in mild or moderate rejection. The most sensitive criterion was the measurement of posterior wall endocardial velocity in early diastole, a decrease of 10% having a sensitivity of 92% whereas the sensitivity of usual Doppler echocardiographic parameters is only 73%. Acute rejection, even mild cases, can be diagnosed with excellent sensitivity by measuring myocardial velocities by Doppler tissue imaging. This technique has the advantage of being non-invasive, reproducible and reliable in the follow-up of cardiac transplant patients.

[Detection of myocardial viability by echocardiography with dobutamine infusion three weeks after myocardial infarction]. / Détection de la viabilité myocardique par échocardiographie avec perfusion de Dobutamine trois semaine après un infarctus du myocarde.

The aim of this study was to assess the value of low dose dobutamine (5 and 10 gammas/Kg/min) echocardiography for the detection of hibernating myocardium in an infarcted zone three weeks after the initial infarction. The authors studied 23 patients (18 men, 15 women) with an average age of 59 +/- 8 years before and 3 months after angioplasty of the culprit artery. Segmental wall motion was assessed semi-quantitatively by the criteria of the American Society of Echocardiography. All patients had regional contractile abnormalities under basal conditions and all underwent control coronary angiography at 3 months. Improvement of segmental wall motion with dobutamine predicted improvement after revascularisation with positive and negative predictive values of 95% and 85% respectively. The sensitivity and specificity of the test calculated in the usual manner were 83% and 96% respectively. In addition, assessment of diastolic function showed reduction of the isovolumic relaxation time with dobutamine only in patients with hibernating myocardium (120 +/- 30 ms decreasing to 114 +/- 29 ms with dobutamine, p < 0.02). Low dose dobutamine echocardiography therefore allows reliable non-invasive prediction of hibernating myocardium three weeks after infarction. The reduction of isovolumic relaxation time with dobutamine could be an additional argument in favour of the diagnosis.

[Blood flow in the isovolumetric relaxation phase in heart transplant patients. Its use in the noninvasive diagnosis of acute rejection]. / Flux en phase de relaxation isovolumétrique chez le transplanté cardiaque. Apport dans le diagnostic non invasif de rejet aigu.

The aim of this study was to assess a Doppler-echocardiographic parameter which has not been previously reported for the diagnosis of acute cardiac rejection. The parameter was left ventricular isovolumic relaxation blood flow. Eighty patients who had undergone orthoptic cardiac transplantation were followed up regularly with echocardiography for a period of 2 years. In all, 495 echocardiographic studies were performed and the results compared with those of endomyocardial biopsy performed on the same day (11.4 echocardiographic studies per patient). In the absence of cardiac rejection, isovolumic relaxation Doppler signal was recorded in all patients (364/387 echo studies). This was a positive signal directed towards the apex detected by continuous mode Doppler in the apical position, arising along the interventricular septum in the mid part of the left ventricle (82% of cases) or from the basal region of the septum (18% of cases) and lasting throughout the phase of isovolumic relaxation. The maximal velocity was 0.53 +/- 0.08 m/s (range 0.32 to 0.73 m/s) : the velocity-time integral was 34 +/- 33 cm. This signal was associated with medioventricular endosystolic acceleration of blood flow in 75% of cases. The incidence of the isovolumic relaxation flow signal decreased in cardiac rejection with no significant changes in the other usual Doppler-echocardiographic parameters except for a significant decrease in the ejection fraction in the group with severe rejection. In the group with mild rejection (n = 89) an isovolumic relaxation flow signal was only observed in 52 cases (including 29 in whom immunosuppressive treatment was not increased). In patients with moderate rejection (n = 12) there were only 5 cases in which a isovolumic relaxation flow signal was recorded, and in the group with severe rejection (n = 7), the signal could only be recorded in 1 case. The authors conclude that the absence of an isovolumic relaxation blood flow signal in a cardiac transplant patient is a reliable sign of cardiac rejection with an excellent specificity (94%). The absence of this signal is a sensitive indicator of severe rejection (86%) but less so for moderate (58%) or mild rejection (42%).

[Percutaneous coronary angioscopy in the diagnosis of cardiac graft coronary disease: comparison with the results of angiography]. / Place de l'angioscopie coronaire percutanée dans le diagnostic de la maladie coronaire du transplanté. Comparaison avec l'angiographie.

Coronary disease in cardiac transplant patients is a major factor in the limitation of long term survival. The aim of this study was to compare the results of angioscopy with those of coronary angiography performed systematically every 18 months in our center. Twenty-nine patients (31 angioscopies) were assessed 38 +/- 21 months after transplantation. The appearance observed by angioscopy were: 1) normal, 2) yellow pigmentation of the arterial surface, 3) elevated plaque < 50%, 4) elevated plaque > or = 50% stenosis. Angiography was: 1) normal, 2) iregularities of the lumen or < 50% stenosis, 3) > or = 50% stenosis. The films were viewed by two independent investigators. Angioscopy was performed on the left anterior descending artery (N = 35), the left circumflex (N = 24) and the right coronary artery (N = 9). One to three arterial segments were examined per vessel (total of 117 segments: average 3.8 segments per patient). Angioscopy was uniterpretable in 13/117 (11%) of cases. Of the 81 (78%) segments considered normal at coronary angiography, only 55 seemed normal at angioscopy (68%). Of the 23 segments considered to be abnormal at coronary angiography, all were also considered to be abnormal at angioscopy. The authors conclude that coronary angioscopy seems to be more sensitive than coronary angiography for the detection of coronary disease due to chronic rejection. Prospective studies are required to determine whether the infra-angiographic angioscopic lesions correspond to earlier stages of coronary disease of the cardiac graft.

Doppler tissue imaging quantitates regional wall motion during myocardial ischemia and reperfusion.

BACKGROUND: Quantification of regional myocardial function is a major unresolved issue in cardiology. We evaluated the accuracy of pulsed Doppler tissue imaging (DTI), a new echocardiographic technique, to quantify regional myocardial dysfunction induced by acute ischemia and reperfusion. METHODS AND RESULTS: In nine open-chest anesthetized pigs, various degrees of regional wall motion abnormalities were induced by graded reduction of left anterior descending coronary artery (LAD) blood flow. Pulsed Doppler tissue imaging was performed from an epicardial apical four-chamber view with the sample placed within the middle part of the septal wall. Peak septal velocities were calculated during systole, isovolumic relaxation, and early and late diastole. Regional myocardial blood flow and systolic and diastolic dysfunctions were assessed by radioactive microspheres and ultrasonic crystals, respectively. Ischemia resulted in a significant rapid reduction of systolic velocities and an early decrease in the ratio of early to late diastolic velocities. Both changes were detected by pulsed DTI within 5 seconds of coronary artery occlusion. The decrease in systolic velocity significantly correlated with both systolic shortening (r=.90, P<.0001) and regional myocardial blood flow (r=.96, P<.0001) during reduction of LAD blood flow. CONCLUSIONS: These results suggest that DTI may be a promising new tool for the quantification of ischemia-induced regional myocardial dysfunction.

Assessment of the progression of cardiac allograft vasculopathy by dobutamine stress echocardiography.

BACKGROUND: After heart transplantation, accelerated coronary vasculopathy is a major factor that limits long-term survival and is usually detected by serial coronary angiography. The aim of this study was to determine whether dobutamine stress echocardiography could accurately identify the progression of cardiac allograft vasculopathy. METHODS: Two sequential controls by dobutamine stress echocardiography were performed at an 18-month interval in 37 heart transplant recipients at the time of their routine coronary angiography. The first control (control 1) occurred 37+/-20 months after transplantation, and the second control (control 2) occurred after 56+/-21 months. Standard echocardiographic views were acquired at baseline and at incremental dobutamine infusion levels. Regional wall motion score was calculated in a 16-segment model, and each segment was graded from 1 (normal) to 4 (dyskinesia). Visual and quantitative coronary angiographic analysis were used to assess the severity of the coronary vasculopathy. RESULTS: The incidence of coronary vasculopathy increased from 46% (17/37 patients, four of whom had stenoses > 50%) at control 1 fo 70% (26/37 patients, six of whom had stenoses > 50%) at control 2. Progression of coronary vasculopathy was diagnosed by coronary angiography in 25 patients (new abnormalities in 19 and worsening of previous abnormalities in 6). Dobutamine stress echocardiography correctly identified the progression of vasculopathy in 21 of these 25 patients (84%) with new abnormalities in 17 and worsening in four. In the four remaining patients with evidence of progression of vasculopathy on coronary angiography, the result of dobutamine stress echocardiography was abnormal in three patients and normal in only one. Therefore dobutamine stress echocardiography results were abnormal in 12 patients at control 1 (sensitivity: 65%, specificity: 95%) and in 27 at control 2 (92% sensitivity, 73% specificity). CONCLUSION: Dobutamine stress echocardiography is a sensitive, noninvasive method to diagnose the progression of allograft vasculopathy, and a negative test result is a strong predictor of absence of allograft coronary vasculopathy. Therefore serial routine coronary angiography may be deferred when dobutamine stress echocardiography results are normal.

A new treatment for severe pulmonary embolism: percutaneous rheolytic thrombectomy.

BACKGROUND: The rheolytic thrombectomy catheter has been specially designed to remove intravascular thrombus from coronary and peripheral arteries. It demonstrates a practical application of Bernoulli's principle relating to a low-pressure zone in the region of a high-velocity jet. In this device, this effect is created by direct high-pressure saline jets located at the tip. Thrombus is drawn into this region and, because of the large pressure difference, undergoes mechanical thrombolysis due to the powerful mixing forces. The resulting microparticles are aspirated through the same catheter and removed from the body. METHODS AND RESULTS: We report the use of this device in two patients presenting with severe pulmonary embolism and contraindications to thrombolytic therapy. The two procedures were successfully performed with an excellent immediate angiographic result at the site of the rheolytic thrombectomy. In both cases, the clinical improvement was maintained at follow-up with the same good angiographic result and a decrease to a normal level of the systolic pulmonary pressure. CONCLUSIONS: This preliminary results suggest that this easy technical method may be useful in the treatment of life-threatening pulmonary embolism in patients with absolute contraindications to thrombolytic therapy. A larger cohort of patients is necessary to determine whether this treatment should be proposed as an alternative to the use of fibrinolytics in selected patients.

Angioscopic evaluation of rotational atherectomy followed by additional balloon angioplasty versus balloon angioplasty alone in coronary artery disease: a prospective, randomized study.

OBJECTIVES: This study sought to compare, by angioscopy, the morphologic changes induced by rotational atherectomy, followed by additional angioplasty, with those observed after balloon angioplasty alone. BACKGROUND: Rotational atherectomy and balloon angioplasty act by different mechanisms, which could explain the difference in morphologic changes induced by these two techniques. METHODS: The study group included 50 patients with 50 lesions who were randomly assigned to undergo rotational atherectomy (n = 24) or balloon angioplasty (n = 26). Rotational atherectomy with a single burr (approximately equal to 70% of coronary diameter) was systematically followed by additional balloon angioplasty. Angioscopy was performed immediately after the procedure. Abnormal angioscopic findings were 1) flaps, graded from 1 to 3 (1 = intimal flap; 2 = flap protruding into < 50% of the lumen; 3 = flap protruding into > or = 50% of the lumen); 2) thrombi, graded from 1 to 3 (1 = flat deposits; 2 = protruding but nonocclusive thrombus; 3 = occlusive thrombus); 3) subintimal hemorrhage; 4) longitudinal dissection. The two groups were comparable for clinical and angiographic baseline data. RESULTS: On angioscopy, flaps were observed less frequently after rotational atherectomy followed by additional balloon angioplasty (8 [33%] of 24 lesions) than after balloon angioplasty alone (14 [54%] of 26 lesions, p = 0.08) and were also less severe (grade 1 in 6 lesions, grade 2 in 2 and grade 3 in none vs. grade 1 in 4 lesions, grade 2 in 5 and grade 3 in 5). Longitudinal dissections were also significantly less frequent: one versus six (p = 0.05). There was no difference in the incidence of angioscopic thrombi (p = 0.16) or subintimal hemorrhage (p = 0.15), but the power to detect a significant difference was low for these variables (37% and 26%, respectively). CONCLUSIONS: Rotational atherectomy followed by additional balloon angioplasty leads to fewer angioscopic dissections and a trend toward fewer intimal flaps than balloon angioplasty alone. However, our angioscopic differences did not lead to an outcome difference between the two groups.

Role of endogenous endothelin in chronic heart failure: effect of long-term treatment with an endothelin antagonist on survival, hemodynamics, and cardiac remodeling.

BACKGROUND: Plasma levels of the vasoconstrictor peptide endothelin (ET) are increased in chronic heart failure (CHF), and ET levels are a major predictor of mortality in this disease. Thus, ET may play a deleterious role in CHF. The purpose of this study was to assess the effects of chronic treatment with the ET receptor antagonist bosentan in a rat model of CHF. METHODS AND RESULTS: Rats were subjected to coronary artery ligation and were treated for 2 or 9 months with placebo or bosentan (30 or 100 mg x kg(-1) x d(-1)). Bosentan 100 mg x kg(-1) markedly increased survival (after 9 months: untreated, 47%; bosentan, 65%; P<.01). Throughout the 9-month treatment period, bosentan significantly reduced arterial pressure and heart rate. After 2 or 9 months of treatment, the ET antagonist reduced central venous pressure and left ventricular (LV) end-diastolic pressure as well as plasma catecholamines, urinary cGMP, and LV ventricular collagen density. Bosentan also reduced LV dilatation (evidenced at 2 months by a shift in the pressure/volume relationship ex vivo). Echocardiographic studies performed after 2 months showed that the ET antagonist reduced hypertrophy and increased contractility of the noninfarcted LV wall. The lower dose of bosentan (30 mg x kg(-1)), which had no major hemodynamic or structural effects, also had no effect on survival. CONCLUSIONS: Long-term treatment with an ET antagonist markedly increases survival in this rat model of CHF. This increase in survival is associated with decreases in both preload and afterload and an increase in cardiac output as well as decreased LV hypertrophy, LV dilatation, and cardiac fibrosis. Thus, chronic treatment with ET antagonists such as bosentan might be beneficial in human CHF and might increase long-term survival in this disease.

[Comparison of myocardial velocities by tissue color Doppler imaging in normal subjects and in dilated cardiomyopathy]. / Comparaison des vélocités myocardiques par Doppler couleur tissulaire chez des sujets normaux et dans les cardiomyopathies dilatées.

The authors studied 35 normal subjects (41 +/- 6 years) and 22 patients with idiopathic dilated cardiomyopathy 48 +/- 7 years; ejection fraction: 31 +/- 12%) in order to determine normal values of myocardial velocities and to demonstrate the sensitivity of Doppler tissue imaging in detecting a significant decrease in myocardial velocities in patients with abnormal left ventricular contractility. Interventricular septal and left ventricular posterior wall velocities were recorded by M mode long axis parasternal views. In normal subjects, a velocity gradient in the posterior wall was observed, higher in the endocardium than in epicardium, in systole (5.1 +/- 1.5 versus 2.8 +/- 1 cm/s, p < 0.01), and early diastole (13.7 +/- 3.5 versus 5.7 +/- 2 cm/s, p < 0.001) and late diastole at the time of atrial contraction (2.7 +/- 2.1 versus 1.8 +/- 1.7 cm/s, p < 0.01). Moreover, the velocities are higher in the posterior wall than in the interventricular septum throughout the cardiac cycle. Finally, the velocities are higher in early diastole than in systole, both in the interventricular septum and posterior wall. In the group of patients with idiopathic dilated cardiomyopathy, the intramyocardial velocities were lower than in normal subjects. In addition, the velocity gradient in the posterior wall was absent in 15 of the 22 patients. The authors conclude that Doppler tissue imaging provides new information in the analysis of myocardial function both in systole and diastole.

[Peripheral and coronary artery dissections in a young woman. A rare case of type IV Ehlers-Danlos syndrome]. / Dissections artérielles périphériques et coronaires chez une femme jeune. Un cas exceptionnel de syndrome d'Ehlers-Danlos de type IV.

Spontaneous coronary dissection is rare and the diagnosis is usually post-mortem. Less than 60 cases have been diagnosed at coronary angiography. The authors report, to the best of their knowledge, the first case of multiple spontaneous coronary artery dissections in a type IV Ehlers-Danlos syndrome in a young woman admitted to hospital for acute myocardial infarction. She had a previous history of regressive complete tetraplegia due to dissection of the basilar artery and episodes of dizziness related to a dissecting aneurysm of the left vertebral artery. The diagnosis of type IV Ehlers-Danlos syndrome was established after skin biopsy had shown typical histological changes. The patient died several months later after an acute abdominal syndrome probably related to dissection of the aorta. An autopsy was refused by her family. The authors believe this to be the first case of spontaneous coronary dissection related to a type IV Ehlers-Danlos syndrome.

Adaptation to myocardial ischemia during coronary angioplasty demonstrated by clinical, electrocardiographic, echocardiographic, and metabolic parameters.

It has been shown that brief episodes of myocardial ischemia can render the heart more resistant to a prolonged subsequent ischemic episode. This phenomenon, called "preconditioning," has been described in human beings during coronary angioplasty with the use of clinical, electrocardiographic (ECG), or metabolic parameters. The goal of this study was to assess this phenomenon further with the use of echocardiographic and metabolic parameters in addition to clinical and ECG parameters. Eighteen patients with isolated stenosis of the left anterior descending coronary artery and a normal left ventricular function were included. Angioplasty consisted of four consecutive balloon inflations. Sequential changes in clinical, ECG (intracoronary ECG), echocardiographic, and metabolic parameters of myocardial ischemia were compared between the first and the fourth balloon inflations. Improved tolerance to myocardial ischemia with repeated coronary occlusions was demonstrated by a significant reduction in the severity of angina, ST-segment elevation, wall motion abnormalities, and lactate production. This study confirms the adaptation of myocardial ischemia to repeated coronary occlusions through measurement of clinical, ECG, echocardiographic, and metabolic parameters.

[Coronary bypass in patients with severe left ventricular dysfunction (EF < or = 25%). Apropos of 111 patients]. / Pontage coronaire chez les patients avec dysfonction ventriculaire gauche sévère (FE < or = 25%). A propos de 111 patients.

One hundred and eleven patients with severe left ventricular dysfunction (EF < or = 25%) underwent coronary bypass surgery between January 1984 and December 1994. The selection criteria were based on the measurement of an EF < or = 25%, LVEDP and CI. All patients had angina and 83 had signs of pulmonary oedema or episodes of congestive failure. Patients with valvular disease, left ventricular aneurysms, reoperations, surgery for arrhythmias and prior angioplasty, were excluded. The coronary disease usually involved all three vessels. Seventeen patients had lesions of the left main stem associated with lesions of the right coronary artery. The average number of bypass grafts was 2.6 +/- 1.6 per patient. The average duration of aortic clamping was 60 +/- 19 minutes. Operative mortality (first month after surgery) was 10 patients (9%). The operative risk factors were: gender, stage of cardiac failure, emergency surgery, LVEDP > 23 mmHg (p < 0.05), CI < 21/min/m2 (p < 0.05). The mean follow-up period was 42 +/- months (3 lost to follow-up). Late mortality was 42 patients. The one year actuarial survival was 88 +/- 5.3%, 76 +/- 9% at 3 years, and 56 +/- 18% at 6 years. Long-term functional results were related to: preoperative stage of cardiac failure (NYHA stage IV) and the association of raised LVEDP and low CI. Surgical results remained satisfactory, however, and the surgical indication was justified in selected patients despite severe left ventricular dysfunction in cases usually with stable invalidating or unstable angina, in the knowledge that myocardial deterioration is progressive in the medium-term with a high incidence of cardiac failure.

Automatic arrhythmia identification using analysis of the atrioventricular association. Application to a new generation of implantable defibrillators. Participating Centers of the Automatic Recognition of Arrhythmia Study Group.

BACKGROUND: Atrioventricular association is a key criterion for arrhythmia diagnosis. Its use in a defibrillator should significantly reduce the incidence of inappropriate shocks. Therefore, we evaluated the diagnostic accuracy of an algorithm that uses dual-chamber sensing and analysis of atrioventricular association to discriminate ventricular from supraventricular arrhythmias in a prototype of an implantable defibrillator. METHODS AND RESULTS: The algorithm performed a stepwise analysis of arrhythmias. The rhythm was first classified on the basis of cycle lengths. Each episode was then classified as supraventricular or ventricular in origin on the basis of the stability of cycle lengths and atrioventricular association. This algorithm was evaluated in 156 episodes of induced sustained tachycardias. Eighty-nine tachycardias were taken from the Ann Arbor electrogram library; the others were recorded in 50 patients during electrophysiological studies. The atrial and ventricular signals were stored on an external recorder and then injected into an external prototype of a defibrillator system. The algorithm correctly diagnosed 96% of ventricular tachycardia episodes, 100% of ventricular fibrillation episodes, and 92% of double-tachycardia episodes. The mean detection time for ventricular tachycardia was 2.6 +/- 0.8 seconds, and for ventricular fibrillation, it was 2.1 +/- 0.4 seconds. The positive predictive values for the diagnoses of atrial fibrillation and atrial flutter were 92% and 86%, respectively. For ventricular tachycardia and ventricular fibrillation, the values were 95% and 100%, respectively. CONCLUSIONS: Analysis of atrioventricular association promotes reliable differentiation between ventricular and supraventricular tachycardias and should enhance the diagnostic capabilities of implantable defibrillators.

Effect of the direct nitric oxide donors linsidomine and molsidomine on angiographic restenosis after coronary balloon angioplasty. The ACCORD Study. Angioplastic Coronaire Corvasal Diltiazem.

BACKGROUND: Nitric oxide (NO) donors, in addition to their vasodilator effect, decrease platelet aggregation and inhibit vascular smooth muscle cell proliferation. These actions could have beneficial effects on restenosis after coronary balloon angioplasty. METHODS AND RESULTS: In a prospective multicenter, randomized trial, 700 stable coronary patients scheduled for angioplasty received direct NO donors (infusion of linsidomine followed by oral molsidomine) or oral diltiazem. Treatment was started before angioplasty and continued until 12 to 24 hours before follow-up angiography at 6 months. The primary study end point was minimal lumen diameter, assessed by quantitative coronary angiography, 6 months after balloon angioplasty. Clinical variables were well matched in both groups. However, despite intracoronary administration of isosorbide dinitrate, the reference diameter in the NO donor group was significantly greater than in the diltiazem group on the preangioplasty, postangioplasty, and follow-up angiograms. Pretreatment with an NO donor was associated with a modest improvement in the immediate angiographic result compared with pretreatment with diltiazem (minimum luminal diameter, 1.94 versus 1.81 mm; P = .001); this improvement was maintained at the 6-month angiographic follow-up (minimal lumen diameter, 1.54 versus 1.38 mm; P = .007). The extent of late luminal narrowing did not differ significantly between groups (loss index in the NO donor and diltiazam groups, 0.35 +/- 0.78 and 0.46 +/- 0.74, respectively; P = .103). Restenosis, defined as a binary variable (> or = 50% stenosis), occurred less often in the NO donor group (38.0% versus 46.5%; P = .026). Combined major clinical events (death, nonfatal myocardial infarction, and coronary revascularization) were similar in the two groups (32.2% versus 32.4%). CONCLUSIONS: Treatment with linsidomine and molsidomine was associated with a modest improvement in the long-term angiographic result after angioplasty but had no effect on clinical outcome. The improved angiographic result related predominantly to a better immediate procedural result, because late luminal loss did not differ significantly between groups.

[Coronary involvement in systemic lupus erythematosus]. / Atteinte coronarienne au cours du lupus Erythémateux systeémique.

BACKGROUND: Coronary artery disease is an uncommon event in lupus erythematosus. The mechanisms responsible for coronary occlusion are probably complex and intermixed. We report three patients with lupus erythematosus and antiphospholipid antibodies who had coronary artery disease diagnosed with coronary angiogram. OBSERVATION: Coronary artery disease occurred in three young patients aged from 21 to 35 years 3 to 11 years after the onset of lupus. They all had antiphospholipid antibodies. They had been treated with corticosteroids for 6 to 36 months. Two of them were smokers. Angiograms showed coronary occlusion two patients while the third one had probable myocardial microvasculopathy. The lupus was quiescent in all cases when coronary artery disease occurred. DISCUSSION: Antiphospholipid antibodies associated with smoking may be involved in the pathogenesis of coronary artery disease in these 3 patients.

[Primary treatment of left coronary artery diseases by percutaneous implantation of stents]. / Traitement en première intention des lésions du tronc commun de la coronaire gauche par implantation percutanée d'une endoprothèse.

Left main coronary artery (LM) stenting has only been reported in bail-out situations or absolute contraindications so surgery. The authors report the immediate and midterm results of primary Palmaz-Schatz stent implantation in two young patients without contraindication to surgery. The first patient, 58 year-old, was admitted for unstable angina in October 1994. Coronary angiography showed an isolated severe ostial lesion of the LM. After conferring with the surgical team which remained on stand-by, angioplasty and stent implantation were performed with excellent results, no complications and no restenosis on angiographic controls at 3 and 12 months. The patient remained asymptomatic 24 months later. The second patient, 38 year-old, was admitted in June 1995 for unstable angina, and coronary angiography showed a severe isolated stenosis in the middle of a long and wide LM. Primary coronary stenting was also performed with excellent results, no complication and no restenosis on angiographic controls at 4 and 8 months. This patient was still asymptomatic 16 months after stenting. These excellent immediate and medium-term results are encouraging and suggest that this form of treatment might be extended to patients with an isolated whether primary LM stent implantation could become a suitable alternative to surgery in the future.