abstract：:Definitive localization of accessory pathways is based on atrial activation patterns during orthodromic supraventricular tachycardia when retrograde conduction occurs exclusively through the accessory pathway. In some patients, supraventricular tachycardia cannot be induced or is deleterious. To determine whether acce...

journal_title：Journal of the American College of Cardiology

authors： Crossen KJ,Lindsay BD,Cain ME

更新日期：1987-06-01 00:00:00

abstract：:Development or progression of left ventricular hypertrophy has recently been described in children with hypertrophic cardiomyopathy. To determine whether similar changes in magnitude and distribution of left ventricular hypertrophy may also occur in adult patients with this disease, serial assessment of left ventricul...

journal_title：Journal of the American College of Cardiology

authors： Spirito P,Maron BJ

更新日期：1987-05-01 00:00:00

abstract：:The relation between perfusion of the infarct-related artery and changes in left ventricular volume and function during the month after a first myocardial infarction was examined in 40 patients who did not receive thrombolytic therapy. Infarct artery perfusion was documented at predischarge coronary angiography, and l...

journal_title：Journal of the American College of Cardiology

authors： Jeremy RW,Hackworthy RA,Bautovich G,Hutton BF,Harris PJ

更新日期：1987-05-01 00:00:00

abstract：:Recently, there has been a resurgence of interest in the use of contrast-enhanced echocardiography as a means of noninvasively assessing myocardial perfusion. However, if injections of echocardiographic contrast agents are to be used for this purpose it is essential that they are not intrinsically toxic to the heart. ...

journal_title：Journal of the American College of Cardiology

authors： Lang RM,Borow KM,Neumann A,Feinstein SB

更新日期：1987-04-01 00:00:00

abstract：:To evaluate the risks of and optimal method for valve dilation in aortic stenosis, balloons of different sizes were used to dilate the normal aortic root in 16 lambs and then stenotic valves in 15 children. In the lambs, inflated balloon to aortic anulus diameter ratios ranged from 0.9 to 1.5. These hearts were examin...

journal_title：Journal of the American College of Cardiology

authors： Helgason H,Keane JF,Fellows KE,Kulik TJ,Lock JE

更新日期：1987-04-01 00:00:00

abstract：:Twenty patients with a chronic total coronary artery occlusion were studied before and 1 to 48 months (mean 9) after successful recanalization by angioplasty and compared with a group of 20 normal subjects. Before angioplasty, 19 of these 20 patients had angina. Collateral vessels to the distal part of the occluded ve...

journal_title：Journal of the American College of Cardiology

authors： Melchior JP,Doriot PA,Chatelain P,Meier B,Urban P,Finci L,Rutishauser W

更新日期：1987-04-01 00:00:00

abstract：:Myocardial thallium-201 scintigraphy is being increasingly employed as a method for assessing the efficacy of coronary reperfusion in acute myocardial infarction. New thallium uptake after intracoronary tracer administration after successful recanalization indicates that nutrient blood flow has been successfully resto...

journal_title：Journal of the American College of Cardiology

authors： Beller GA

更新日期：1987-03-01 00:00:00

abstract：:Noninvasive assessment was undertaken before hospital discharge in 210 patients who had recovered from acute myocardial infarction. This comprised signal-averaged electrocardiography, Holter monitoring and radionuclide left ventriculography. An abnormal signal-averaged electrocardiogram was defined as the presence of ...

journal_title：Journal of the American College of Cardiology

authors： Kuchar DL,Thorburn CW,Sammel NL

更新日期：1987-03-01 00:00:00

abstract：:Pulmonary artery pressure was noninvasively estimated by three Doppler echocardiographic methods in 50 consecutive patients undergoing cardiac catheterization. First, a systolic transtricuspid gradient was calculated from Doppler-detected tricuspid regurgitation; clinical jugular venous pressure or a fixed value of 14...

journal_title：Journal of the American College of Cardiology

authors： Chan KL,Currie PJ,Seward JB,Hagler DJ,Mair DD,Tajik AJ

更新日期：1987-03-01 00:00:00

abstract：:Ten patients with chronic congestive heart failure were studied to assess the hemodynamic effects and bioavailability of a transdermal nitroglycerin delivery system. Nitrate sensitivity was defined by a prior 20 minute infusion of nitroglycerin, 21 micrograms/min. Five patients with a satisfactory hemodynamic response...

journal_title：Journal of the American College of Cardiology

authors： Armstrong PW

更新日期：1987-02-01 00:00:00

abstract：:Although digoxin is often the first choice for control of ventricular response in chronic atrial fibrillation, it fails to slow exercise rates. Diltiazem, a calcium channel antagonist that slows atrioventricular conduction, was administered to 16 patients who failed to achieve adequate rate control on low level exerci...

journal_title：Journal of the American College of Cardiology

authors： Steinberg JS,Katz RJ,Bren GB,Buff LA,Varghese PJ

更新日期：1987-02-01 00:00:00

abstract：:Unipolar and bipolar floating atrial electrograms from 58 pacemaker patients were recorded and compared. Twenty-four floating unipolar electrodes and 29 floating bipolar electrodes were used at mid-right atrial level and five orthogonal atrial J leads within the right atrial appendage. Each signal was analyzed in the ...

journal_title：Journal of the American College of Cardiology

authors： Aubert AE,Goldreyer BN,Wyman MG,Ector H,Denys BG,De Geest H

更新日期：1987-02-01 00:00:00

abstract：:A case of paroxysmal bradycardia- and tachycardia-dependent atrioventricular (AV) block is described in a patient with right bundle branch block. The His bundle recordings demonstrated the site of the AV block to be distal to the His bundle recording site (probably in the left bundle branch). Whereas AV block distal t...

journal_title：Journal of the American College of Cardiology

authors： Denes P,Murabit I,Ezri M,Eybel C

更新日期：1987-02-01 00:00:00

abstract：:To test the hypothesis that the human sinus node is capable of demonstrating multiple sites of impulse generation, we assessed spontaneous shifts in the sinus node pacemaker complex, and shifts after overdrive atrial pacing, premature atrial stimulation and carotid sinus massage. A total of 24 patients aged 59 +/- 15 ...

journal_title：Journal of the American College of Cardiology

authors： Gomes JA,Winters SL

更新日期：1987-01-01 00:00:00

abstract：:A patient with a rare intracardiac tumor arising from the right side of the interventricular septum who developed conduction disturbances and symptoms of right ventricular outflow tract obstruction is reported. The patient was successfully treated with insertion of a permanent pacemaker and surgical removal of the tum...

journal_title：Journal of the American College of Cardiology

authors： Grigg LE,Downey W,Tatoulis J,Hunt D

更新日期：1987-01-01 00:00:00

abstract：:To assess the potential of in vivo nuclear magnetic resonance imaging for the detection of reperfused myocardium, in vivo T2-weighted spin echo images were obtained of dogs at 0.15 tesla. Imaging was done during 3 hours of coronary occlusion (group I), and during 3 hours of coronary occlusion followed by 1 hour of rep...

journal_title：Journal of the American College of Cardiology

authors： Johnston DL,Liu P,Rosen BR,Levine RA,Beaulieu PA,Brady TJ,Okada RD

更新日期：1987-01-01 00:00:00

abstract：:Left ventricular performance was evaluated noninvasively in 111 patients participating at one study center in the Norwegian Multicenter Study on Timolol After Myocardial Infarction. Systolic time intervals were measured in 55 patients treated with timolol and in 56 patients receiving placebo. Measurements were made be...

journal_title：Journal of the American College of Cardiology

authors： Brubakk O,Pedersen TR,Overskeid K

更新日期：1987-01-01 00:00:00

abstract：:This double-blind, randomized study evaluated the effect of nifedipine on restenosis after coronary angioplasty. Two hundred forty-one patients with dilation of 271 coronary sites were randomized at the time of hospital discharge to receive nifedipine, 10 mg (123 patients), or placebo (118 patients) four times daily f...

journal_title：Journal of the American College of Cardiology

authors： Whitworth HB,Roubin GS,Hollman J,Meier B,Leimgruber PP,Douglas JS Jr,King SB 3rd,Gruentzig AR

更新日期：1986-12-01 00:00:00

abstract：:Electrocardiographic monitoring and provocative ventricular pacing were used to evaluate control and nadolol treatment groups 6 to 24 hours after left anterior descending coronary artery ligation in the dog. During the 6 to 24 hour period, the control group (n = 20) developed ventricular triplets at rates exceeding 27...

journal_title：Journal of the American College of Cardiology

authors： Patterson E,Scherlag BJ,Lazzara R

更新日期：1986-12-01 00:00:00

abstract：:Indications and the type of antithrombotic therapy for the prevention of thromboembolism in patients with valvular heart disease, mechanical prosthetic heart valves and bioprosthetic heart valves are discussed. The evidence for these clinical recommendations is described and graded into five levels. The indications fo...

journal_title：Journal of the American College of Cardiology

authors： Chesebro JH,Adams PC,Fuster V

更新日期：1986-12-01 00:00:00

abstract：:Pulsed Doppler echocardiography was used to determine prospectively the prevalence of mitral, aortic, tricuspid and pulmonary regurgitation in 80 consecutive patients with mitral valve prolapse and 85 normal subjects with similar age and sex distribution. Mitral valve prolapse was defined by posterior systolic displac...

journal_title：Journal of the American College of Cardiology

authors： Come PC,Riley MF,Carl LV,Nakao S

更新日期：1986-12-01 00:00:00

abstract：:Streptokinase and urokinase have proved to be useful in a limited number of clinical conditions. Mainly because of the risk and unpredictability of bleeding with this first generation of thrombolytic agents, thrombolysis has not been ingrained in medical practice. In the interim, more fibrin-specific thrombolytic agen...

journal_title：Journal of the American College of Cardiology

authors： Verstraete M,Collen D

更新日期：1986-12-01 00:00:00

abstract：:Although many drugs have inhibitory effects on platelet function, none of them inhibits all of the mechanisms that may be involved in the various forms of thrombosis. Choice of suitable drugs is hampered by lack of full knowledge concerning the reactions that make the major contributions to the formation of arterial t...

journal_title：Journal of the American College of Cardiology

authors： Harker LA,Fuster V

更新日期：1986-12-01 00:00:00

abstract：:This study describes the velocity characteristics of left ventricular and aortic outflow in 25 patients with hypertrophic "obstructive" cardiomyopathy. Systematic pulsed and continuous wave Doppler analysis combined with phonocardiography and M-mode echocardiography was used to establish the pattern and timing of outf...

journal_title：Journal of the American College of Cardiology

authors： Yock PG,Hatle L,Popp RL

更新日期：1986-11-01 00:00:00

abstract：:Myocardial reperfusion after reversible regional ischemia is known to result in delayed recovery of contractile function, but the mechanism responsible for this phenomenon remains unclear. We examined the ability of N-2-mercaptopropionylglycine, a synthetic thiol compound with oxygen free radical scavenging properties...

journal_title：Journal of the American College of Cardiology

authors： Myers ML,Bolli R,Lekich RF,Hartley CJ,Roberts R

更新日期：1986-11-01 00:00:00

abstract：:Thirty adult patients with aortic stenosis had Doppler echocardiography within 1 day of cardiac catheterization. Noninvasive measurement of the mean transaortic pressure gradient was calculated by applying the simplified Bernoulli equation to the continuous wave Doppler transaortic velocity recording. Stroke volume wa...

journal_title：Journal of the American College of Cardiology

authors： Teirstein P,Yeager M,Yock PG,Popp RL

更新日期：1986-11-01 00:00:00

abstract：:Seven cases of pulmonary atresia with intact ventricular septum were detected in prenatal life. In two of these cases, there was a small hypertrophied right ventricle of the type commonly seen postnatally. In the remaining five cases, the right atrium and right ventricle were grossly dilated to a degree that caused lu...

journal_title：Journal of the American College of Cardiology

authors： Allan LD,Crawford DC,Tynan MJ

更新日期：1986-11-01 00:00:00

abstract：:In a 69 year old woman with a "sticking" Björk-Shiley mitral prosthesis, the diagnosis was suggested by both the two-dimensional and the Doppler ultrasound examinations. In particular, the findings of early diastolic paradoxic septal motion, intermittent delayed opening of the prosthetic disc and variable timing of th...

journal_title：Journal of the American College of Cardiology

authors： Mann DL,Gillam LD,Marshall JE,King ME,Weyman AE

更新日期：1986-10-01 00:00:00

abstract：:Much effort has recently been directed toward ultrasound characterization of normal and abnormal left ventricular myocardium. The purpose of this study was to evaluate the normal acoustic properties of all four cardiac chambers as a first step toward tissue characterization of the atria and ventricles. The hypothesis ...

journal_title：Journal of the American College of Cardiology

authors： Baello EB Jr,McPherson DD,Conyers DJ,Collins SM,Skorton DJ

更新日期：1986-10-01 00:00:00

abstract：:An echocardiographic Doppler study in a patient with pulsus paradoxus of respiratory origin demonstrated a large inspiratory increase of tricuspid flow velocity and a corresponding decrease of mitral flow velocity. This "flow paradoxus" is therefore not specific for cardiac tamponade, and provides evidence that decrea...

journal_title：Journal of the American College of Cardiology

authors： Hoit B,Sahn DJ,Shabetai R

更新日期：1986-09-01 00:00:00

abstract：:Electrical catheter ablation of arrhythmogenic sites is now being used for the treatment of ventricular tachycardias. However, the extent and type of the ablation lesion in relation to energy level are controversial and not well known. In 10 beagles, single cathodal shocks of 30 (4 dogs), 80 (2 dogs) or 250 J (4 dogs)...

journal_title：Journal of the American College of Cardiology

authors： Hauer RN,Straks W,Borst C,Robles de Medina EO

更新日期：1986-09-01 00:00:00

abstract：:Certain clinical and cardiac morphologic findings are described in 22 patients, aged 45 to 80 years (mean 64) (15 men [68%]), in whom rupture of a papillary muscle occurred during acute myocardial infarction. In most, the acute infarction associated with papillary muscle rupture was a first coronary event (only 18% ha...

journal_title：Journal of the American College of Cardiology

authors： Barbour DJ,Roberts WC

更新日期：1986-09-01 00:00:00

abstract：:In 162 patients with acute transmural myocardial infarction, combined intravenous and intracoronary thrombolytic therapy with streptokinase was initiated. In vessels that remained occluded, mechanical recanalization was performed with a 3F recanalization catheter (group I, n = 79) or a 4F Grüntzig balloon catheter (gr...

journal_title：Journal of the American College of Cardiology

authors： Erbel R,Pop T,Henrichs KJ,von Olshausen K,Schuster CJ,Rupprecht HJ,Steuernagel C,Meyer J

更新日期：1986-09-01 00:00:00

abstract：:The long-term prognosis of adult patients with patent ductus arteriosus treated medically or surgically has not been demonstrated. One hundred seventeen adult patients ranging in age from 18 to 81 years (mean 36) were followed up for 1 to 37 years (mean 18). Forty-five patients were treated nonsurgically and 72 had su...

journal_title：Journal of the American College of Cardiology

authors： Fisher RG,Moodie DS,Sterba R,Gill CC

更新日期：1986-08-01 00:00:00

abstract：:Double outlet right ventricle associated with complete atrioventricular (AV) canal is a rare malformation. Nine cases are reported. In this abnormality the anterior AV leaflet is undivided and free floating and the aortic and pulmonary orifices are in the same frontal plane. In four of the nine cases, the conus was bi...

journal_title：Journal of the American College of Cardiology

authors： Toussaint M,Planche C,Graff WC,Royon M,Ribierre M

更新日期：1986-08-01 00:00:00

abstract：:The morphologic features of alcoholic cardiomyopathy in human sudden death compared with those of experimental alcoholic cardiomyopathy (6 weeks of alcohol administration and simultaneous inhibition of catalase activity) proved to be nearly identical. Regular and similar alterations in alcoholic cardiomyopathy in both...

journal_title：Journal of the American College of Cardiology

authors： Tsiplenkova VG,Vikhert AM,Cherpachenko NM

更新日期：1986-07-01 00:00:00

abstract：:The relative value of predischarge clinical variables, bicycle ergometry, radionuclide ventriculography and 24 hour ambulatory electrocardiographic monitoring for predicting survival during the first year in 351 hospital survivors of acute myocardial infarction was assessed. Discriminant function analysis showed that ...

journal_title：Journal of the American College of Cardiology

authors： Fioretti P,Brower RW,Simoons ML,ten Katen H,Beelen A,Baardman T,Lubsen J,Hugenholtz PG

更新日期：1986-07-01 00:00:00

abstract：:Adjusted subcutaneous heparin was used for thromboembolism prophylaxis during 18 pregnancies in 16 women with an artificial heart valve. Oral warfarin was replaced by subcutaneous heparin as soon as pregnancy was confirmed. The dosage of heparin was adjusted to maintain a partial thromboplastin time at 1.5 times the c...

journal_title：Journal of the American College of Cardiology

authors： Lee PK,Wang RY,Chow JS,Cheung KL,Wong VC,Chan TK

更新日期：1986-07-01 00:00:00

abstract：:Previous studies have suggested that there exists a functional border zone in myocardium at the lateral margins of an ischemic area. The functional border zone is normally perfused but is characterized by abnormal contractile function. To define the spatial characteristics of this border zone, circumferential maps of ...

journal_title：Journal of the American College of Cardiology

authors： Buda AJ,Zotz RJ,Gallagher KP

更新日期：1986-07-01 00:00:00

abstract：:Percutaneous transvenous balloon mitral valvotomy was performed successfully in a 57 year old man with refractory congestive heart failure due to calcific mitral stenosis. Cardiac surgery was not an option because of other major medical problems. Balloon mitral valvotomy was performed using the transseptal technique. ...

journal_title：Journal of the American College of Cardiology

authors： Palacios IF,Lock JE,Keane JF,Block PC

更新日期：1986-06-01 00:00:00