解剖学和形态学
麻醉学
听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
急诊医学
内分泌学和新陈代谢
肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
医学,研究和试验
神经系统科学
护理
营养学和饮食学
产科医学和妇科医学
肿瘤学
眼科学
整形外科学
耳鼻喉科学
病理学
儿科学
周围血管疾病
药理学和药剂学
生理学
基本医疗保健
精神病学
公共、环境和职业卫生
放射学,核医学和医学成像
康复学
生殖生物学
呼吸系统
风湿病学
运动科学
外科学
毒理学
热带医学
泌尿学和肾脏学
病毒学
老年医学
健康政策和服务
心理学,临床
abstract::The relation between ventricular dysrhythmia during the first 20 hours after hospitalization for acute myocardial infarction and enzymatically estimated infarct size was studied prospectively. The duration of dyshythmia was measured by the total time during which the average premature ventricular depolarization (PVC) ...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1976-03-01 00:00:00
abstract::Acute occlusion of the circumflex branch of the left coronary artery was produced in chronically instrumented conscious dogs. Tracer microspheres were used to measure during an established time period, the distribution of collateral flow within the infarcting myocardium. For up to 2 hours after coronary occlusion the ...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1976-03-01 00:00:00
abstract::The nature, prevalence, functional significance, and indeed existence of myocardial disease in progressive systemic sclerosis (PSS) has been debated. In this study the clinical and pathological features of 52 autopsied patients were analyzed in an attempt to resolve these questions. A distinctive focal myocardial lesi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.3.483
更新日期:1976-03-01 00:00:00
abstract::Audible atrial sounds were noted in a patient with congestive cardiomyopathy and atrial fibrillation with slow ventricular rate. Oscillatory motion of similar periodicity as fibrillation waves in the ECG and the sounds in the phonocardiogram was demonstrated in aortic and left ventricular walls, mitral, tricuspid and ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.3.569
更新日期:1976-03-01 00:00:00
abstract::Between 1964 and 1971, 49 patients were discharged from hospital following atrial baffle repair for transposition of the great arteries. Electrocardiograms of 47 of these patients were available for review seven months to eight and a half years (average 31 months) after operation. Of the 46 patients in sinus rhythm pr...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.3.519
更新日期:1976-03-01 00:00:00
abstract::To estimate the effect of distance between the electrode and the signal source on the amplitude of the His bundle electrogram (HBE) recorded during open heart surgery, a specially designed probe, containing six pairs of closely spaced (1 mm) electrodes was placed on the endocardial surface of the right atrium such tha...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.2.224
更新日期:1976-02-01 00:00:00
abstract::Frank lead vectorcardiograms (VCG) from four carefully selected patient subgroups (226 patients) were analyzed to develop optimal criteria for the diagnosis of anterior myocardial infarction. Specificity was evaluated using 100 healthy volunteers under age 30 and 80 patients with normal left ventriculogram and normal ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.2.229
更新日期:1976-02-01 00:00:00
abstract::The pulmonary perfusion of 25 children who had total surgical correction of tetralogy of Fallot was evaluated by radionuclide perfusion scans. In addition, 18 had 133Xe ventilation studies. Eighteen of the children previously had palliative systemic-pulmonary shunts; 14 had aortic-pulmonary shunts (Waterston or Potts-...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.2.332
更新日期:1976-02-01 00:00:00
abstract::Since quinidine is one of the few agents available to treat and prevent ventricular arrhythmias in ambulatory patients, its hemodynamic effects have been reevaluated. When given in therapeutic doses to anesthetized mongrel dogs, quinidine significantly reduced heart rate, aortic pressure and flow, but it did not signi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.1.101
更新日期:1976-01-01 00:00:00
abstract::Six cases of classical dissecting aneurysm of the aorta complicating aortic valvular disease in which aortic stenosis was dominant are described. In three of the cases the aortic complication occurred after the natural aortic valve had been replaced by a prosthetic valve. The longest postoperative period was four mont...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.1.169
更新日期:1976-01-01 00:00:00
abstract::Between January 1, 1970, and December 31, 1974, 2981 patients underwent coronary arteriography. Twelve acute coronary dissections or embolizations occurred, an incidence of 0.4%. The incidences of acute occlusions for the Sones and Judkins techniques were 0.19% (4/2077 studies) and 0.88% (8/940), respectively. No inst...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.6.1063
更新日期:1975-12-01 00:00:00
abstract::Syncope and sudden death occurs in certain purebred Pug dogs which have been found to have intermittent sinus pauses and paroxysmal second degree heart block on electrocardiographic (ECG) study. We have established a colony of such dogs to study this problem and here report the results of histological examination of t...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.6.1152
更新日期:1975-12-01 00:00:00
abstract::Data from 981 patients evaluated for ischemic heart disease with coronary angiography were reviewed to identify variables predictive of sudden death and duration from onset of symptoms to death. During the period of follow-up, 113 patients died. Of these deaths, 99 were classified as cardiovascular. Forty percent occu...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1975-12-01 00:00:00
abstract::The initial appearance and continuous development of a coronary plaque depends on a combination of hemodynamic trauma, deposition of excess cholesterol, and accretion and incorporation of thrombogenic elements as well as fully formed mural thrombi. Plaques become life-threatening when rupture of their intimal surface ...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1975-12-01 00:00:00
abstract::In patients with atrioventricular (A-V) nodal re-entrant paroxysmal supraventricular tachycardia (PSVT), atrial extrastimulus technique frequently reveals discontinuous A1-A2, H1-H2 curves suggestive of dual A-V nodal pathways. To further test the hypothesis that these curves in fact reflect dual A-V nodal pathways, a...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.5.789
更新日期:1975-11-01 00:00:00
abstract::Nine patients with severe mitral disease were studied before and six months after mitral valve replacement with a three-cusp stented prosthesis using fresh autologous fascia lata tissue. Only patients in whom there was no auscultatory and angiographic evidence of incompetence of the replaced valve were selected for re...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.5.880
更新日期:1975-11-01 00:00:00
abstract::To obtain insight into the mechanism(s) responsible for the direct visualization of acute myocardial infarcts by myocardial scintigraphy with technetium-99m stannous pyrophosphate (99mTc-PYP), scintigraphic and morphologic studies were performed in 22 dogs subjected to occlusion of the proximal left anterior descendin...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.4.596
更新日期:1975-10-01 00:00:00
abstract::The directions and magnitudes of time-normalized P, QRS, and ST vectors, and other ECG parameters were analyzed during and after multistage exercise in 56 ostensibly healthy men aged 23 to 62. By selective averaging with a digital computer system a single representative beat was obtained from each stage. Measurements ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.4.570
更新日期:1975-10-01 00:00:00
abstract::Echocardiographic and cardiac catheterization findings were compared in 61 patients with mitral stenosis without other significant lesions in an attempt to determine the clinical usefulness of echocardiography in the assessment of such patients. There was a poor correlation between the E-F slope on the echocardiogram ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.4.664
更新日期:1975-10-01 00:00:00
abstract::Values for several coronary risk factors, including systolic and diastolic blood pressure, serum cholesterol, triglycerides, blood glucose, uric acid, hemoglobin, weight, vitral capacity and cigarette smoking have been found to be similar among spouses in the Framingham Study. However, longitudinal analyses show that...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.4.589
更新日期:1975-10-01 00:00:00
abstract::Threshold bipolar pacing was performed from one of 12 selected atrial sites with temporary implanted electrodes in 69 patients following open-heart surgery in order to study P wave polarity and morphology and the P-R interval during paced ectopic atrial rhythms. A negative P wave was recorded in lead I only with paci...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.3.426
更新日期:1975-09-01 00:00:00
abstract::Our experimental studies since 1972 show that the heart is preserved best during cardiopulmonary bypass when it is in the beating, nonworking state. Results after mitral valve replacement (MVR) from 1968 to 1974 using various techniques of cardiac preservation were compared. In group I were 47 patients (1968 to 1972) ...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1975-08-01 00:00:00
abstract::Cardiac output and pressure-flow measurements were made in left internal mammary artery-to-left anterior descending coronary artery grafts and left subclavian artery-to-left circumflex coronary artery vein grafts after proximal coronary artery ligation. Similar measurements were also made in left internal mammary arte...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1975-08-01 00:00:00
abstract::Twenty-one reoperations for relief of angina have been performed at Stanford Medical Center in patients who had had previously unsuccessful direct coronary artery surgery. Complete releif of angina was obtained in seven (33%), improvement of angina in six (29%), and no change in angina in eight (38%) after these opera...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1975-08-01 00:00:00
abstract::Phasic blood flow recorded in five unobstructed dog aortocoronary bypass grafts to the left coronary artery was similar to that of normal coronary arteries, with a high diastolic-to-systolic flow ratio which averaged 2.7 +/- 0.4. With an average of 52 +/- 7% and 72 +/- 6% stenosis in the coronary artery distal to the ...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1975-08-01 00:00:00
abstract::The dominance of the coronary arterial system was determined angiographically in 75 adult patients with isolated aortic stenosis with or without insufficiency, 25 adult patients with pure aortic insufficiency, 51 adult patients with combined aortic stenosis and mitral valve disease, and 44 children with bicuspid aorti...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.2.292
更新日期:1975-08-01 00:00:00
abstract::The status of radioactive tracer studies in cardiovascular diagnosis is summarized. Planning guidelines are suggested for a hospital nuclear medical service including a central nuclear medical facility and satellite units, and resource criteria are given for professional personnel including training and duties, equipm...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1975-07-01 00:00:00
abstract::Digoxin, in a common clinical dose and at a low serum level, brought out severe manifestations of sinus node dysfunction in a patient who had previously undergone successful mitral valve replacement. This report presents the results of extensive clinical and electrophysiologic studies of this patient before and after ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.52.1.162
更新日期:1975-07-01 00:00:00
abstract::The significance of the direction of the ST-segment shifts on the 12-lead electrocardiogram was evaluated in 82 consecutive patients with unstable angina. Eighteen patients with ST-segment elevation (group I) were compared with 64 patients with ST-segment depression (group II). There was no difference between group I ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.6.1015
更新日期:1975-06-01 00:00:00
abstract::We have compared casual indirect measurements of arterial pressure obtained 1) by the general practitioner (GP) and 2) in the outpatient clinic (OPC) with 24 hour continuous recording of direct arterial pressure in two selected group of unrestricted patients. 1) Eight asymptomatic, untreated patients with suspected hy...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.6.1101
更新日期:1975-06-01 00:00:00
abstract::Physiological studies of the type we have described, when performed in patients with the WPW syndrome, can yield diagnostic information regarding the mechanism of arrhythmia, demonstrate functional properties of therapeutic import, facilitate therapeutic decision-making about drug regimens and presumptively localize t...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.5.767
更新日期:1975-05-01 00:00:00
abstract::The specific and sensitivity of serum creatine phosphokinase cardiac specific isoenzyme (MB) in the diagnosis of acute myocardial infarction (AMI) was evaluated. An ion-exchange chromatographic technique was used to isolate MB. Sera layered on mini-columns of DEAE-Sephadex were eluted with Tris-buffered sodium chlorid...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.5.855
更新日期:1975-05-01 00:00:00
abstract::The echocardiograms of 46 patients with aortic insufficiency which manifested typical high frequency vibrations of the anterior mitral valve leaflet were reviewed. All patients had overt clinical evidence of aortic insufficiency which was confirmed by angiography in 17 cases. In 17 cases (eight of whom underwent cat...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.4.589
更新日期:1975-04-01 00:00:00
abstract::The sensitivity of the baroreceptor reflex in nine patients with borderline hypertension (mean age 19.1 plus or minus 0.2 years) was compared to that in six normal subjects of comparable age (mean 18.8 plus or minus 0.3 years) and that in 14 patients with established hypertension (mean age 48.3 plus or minus 3.1 years...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.4.738
更新日期:1975-04-01 00:00:00
abstract::A reduced rate of diastolic closure of the anterior mitral leaflet has been shown to occur in mitral stenosis, primary pulmonary hypertension, and in cases with reduced left ventricular compliance. Posterior notion of the posterior mitral leaflet in diastole has been the distinguishing feature to rule out the diagnosi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.3.511
更新日期:1975-03-01 00:00:00
abstract::One of the noninvasive methods of evaluating left ventricular performance is the measurement of left ventricular systolic time intervals (LVSTI). However, noninvasive measurement of right ventricular systole by this technique has been unreliable because of the inability to accurately time the onset of right ventricula...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.2.304
更新日期:1975-02-01 00:00:00
abstract::Coronal, horizontal, and sagittal sections through the mid-line are excellent ways of depicting the anatomical position of the aortic root and for studying its topographical relationship to the surrounding vascular structures. Minimal radiographic abnormalities or no abnormalities at all may be present with an enlarge...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.2.389
更新日期:1975-02-01 00:00:00
abstract::High frequency notching of the QRS complex is associated with transmural infarction, cardiomyopathies, and ventricular hypertrophy from any cause. The mechanism producing notching is unknown; but the presence of a discrete anatomic lesion is not an essential feature. The hypothesis that notching was produced by activa...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.2.257
更新日期:1975-02-01 00:00:00
abstract::Little is known of the functional capacity of coronary collaterals in humans without occlusive coronary artery disease. We, therefore, measured peripheral coronary pressure (PCP) and retrograde flow (RF) from coronary arteries at aortic valve replacement in seven patients without occlusive coronary artery disease. Usi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.1.118
更新日期:1975-01-01 00:00:00
abstract::A longitudinal study was made of 62 patients with dextro-transposition of the great arteries. The patients were managed with balloon atrial septostomy (BAS), palliative surgery if any operation was needed in the first year of life, and Mustard intra-atrial baffle repair after one year of age. Of the 47 patients with i...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.51.1.32
更新日期:1975-01-01 00:00:00