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 electrophysiologic mechanisms for the initiation and termination of re-entrant ventricular arrhythmias (RVA) were critically analyzed in dogs 3-7 days following ligation of the anterior descending coronary artery, utilizing direct recordings of the re-entrant pathway (RP) from the epicardial surface of the infarct...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.5.702
更新日期:1977-05-01 00:00:00
abstract::Calcium metabolism may play an important role in the pathogenesis of myocardial ischemic injury. The effect of the sarcolemmal calcium flux inhibitor, verapamil, on myocardial necrosis was studied in dogs subjected to temporary coronary artery occlusion. One group of dogs was untreated. A second group was given 0.8 mg...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.4.581
更新日期:1977-04-01 00:00:00
abstract::In 15 of 126 (12%) patients with truncus arteriosus who were catheterized at the Mayo Clinic from 1967 through 1975, natural agenesis of one pulmonary artery was present. Ten truncus patients with either natural or acquired absence of one pulmonary artery have undergone definitive operation. The criteria for operabili...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.4.641
更新日期:1977-04-01 00:00:00
abstract::We studied regional myocardial perfusion by scintigraphic computer-assisted analysis of initial distribution, washout rates, and residual activity of 133Xe injected into the left coronary artery of four patients with normal arteriograms and 14 patients with coronary stenosis. At rest, residual activity in poststenotic...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.3.423
更新日期:1977-03-01 00:00:00
abstract::Three patients developed late pulmonary vein obstruction (PVO) following Mustard's operation for transposition of the great arteries. In all three the absence of PVO had been documented by an earlier postoperative cardiac catheterization. At reoperation shrinkage and kinking of the dacron baffle was evident. After Mus...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.3.484
更新日期:1977-03-01 00:00:00
abstract::Relationships between enzyme estimates (EE) and histologic measurements of infarct size (HIS) were analyzed in 14 conscious dogs with permanent occlusion of the circumflex coronary artery. EE were derived from serial CPK, CPK-MM, CPK-MB, and CPK-BB. Estimates were obtained using methods of Shell et al., Norris et al.,...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.3.438
更新日期:1977-03-01 00:00:00
abstract::The effect of bretylium tosylate (BT) was determined in 27 consecutive cases of resistant ventricular fibrillation (VF) encountered by a hospital cardiac arrest team. The VF was sustained and completely resistant to multiple injections of lidocaine, sequential DC shocks at 400 watt-sec and one or a combination of intr...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.3.541
更新日期:1977-03-01 00:00:00
abstract::Labetalol was administered to six hypertensive subjects in increasing doses for seven days. A decrease in both supine and standing arterial pressure and heart rate was observed with no change in cardiac output and few side effects. Exercise tolerance was unaltered by the drug, but the heart rate and arterial pressure ...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.55.2.370
更新日期:1977-02-01 00:00:00
abstract::More accurate characterization of coronary artery lesions is needed for evaluation of short and long-term interventions in coronary disease. A method of segmental artery analysis has been developed to maximize the information obtained from coronary arteriograms. Coronary lesions are traced from two projected, perpendi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.2.329
更新日期:1977-02-01 00:00:00
abstract::Twenty-one patients with documented coronary atherosclerotic heart disease were studied to determine the effect of high dose oral isosorbide dinitrate (ISDN) on heart rate, blood pressure, and exercise time until angina pectoris. Patients were tested in two phases, initially with 0.4 mg of sublingual nitroglycerin and...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1161/01.cir.55.2.381
更新日期:1977-02-01 00:00:00
abstract::The effect of cycle length on atrial vulnerability was studied in 14 patients manifesting reproducible repetitive atrial firing during atrial extra-stimulus (A2) testing. Repetitive atrial firing was defined as the occurrence of two or more premature atrial responses with return cycle (A2-A3) of 250 msec or less and s...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.2.260
更新日期:1977-02-01 00:00:00
abstract::This study was undertaken to determine if computerized tomography (CT scanning) with an EMI cranial scanner could detect edema associated with myocardial ischemia in canine hearts. A localized area of decreased density in the posterior papillary muscle and surrounding myocardium was detected on serial 8 mm CT scan sli...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.1.99
更新日期:1977-01-01 00:00:00
abstract::Premature opening of the pulmonary valve (opening independent of atrial or ventricular systole) was originally described in a case of sinus of Valsalva rupture into the right atrium. Since that time we have observed five additional cases in which the pulmonary valve opened prematurely. Entities encountered included: 1...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.1.128
更新日期:1977-01-01 00:00:00
abstract::Total anomalous pulmonary venous connection (TAPVC) is a rare cardiac congenital abnormality which usually results in death in infancy or early childhood. We describe a 52-year-old man with TAPVC and severe calcific pulmonic stenosis. Both diagnoses were suspected clinically and from the chest X-ray. Cardiac catheteri...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.1.206
更新日期:1977-01-01 00:00:00
abstract::To assess myocardial infarction quantitatively in 15 mm thick transverse sections of the canine heart in vivo we utilized a new technique, positron emission transaxial tomography (PETT) and cyclotron-produced 11C-palmitate (11C-P) injected intravenously. Results were compared to regional myocardial creatine phosphokin...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.1.66
更新日期:1977-01-01 00:00:00
abstract::The relation between left atrial size and atrial fibrillation was examined in 37 patients who had left ventriculomyotomy and myectomy at the National Heart and Lung Institute. Atrial fibrillation was present in 11 of 27 (41%) patients with an echocardiographically measured left atrial dimension greater than 45 mm. No ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.1.178
更新日期:1977-01-01 00:00:00
abstract::From January 1970 to April 1975, 132 patients underwent surgical repair of aneurysms of the ascending aorta at this institution, 24 of whom had acute dissections. In almost all cases the ascending aorta was replaced with a Dacron tube graft. Aortic valve replacement was performed in 100 patients and 23 patients underw...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1976-12-01 00:00:00
abstract::The movements of the mitral, tricuspid and aortic valves have been recorded echocardiographically and related to the first heart sound (S1) in patients with various hemodynamic and conduction abnormalities. Closure of the mitral and tricuspid valves has been studied with respect to the corresponding atrioventricular p...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.6.944
更新日期:1976-12-01 00:00:00
abstract::To assess the results of cardiac repair utilizing a right ventricular to pulmonary artery conduit, we reviewed postoperative hemodynamic data in 16 patients catheterized 0.5 to 5 years after repair. In 12 patients, a Hancock conduit (dacron conduit with porcine valve) was used; the conduit in the remaining four patien...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.6.951
更新日期:1976-12-01 00:00:00
abstract::From January 1968 to June 1975 tricuspid regurgitation was encountered in 238 patients of a total of 1074 patients undergoing operations on the mitral valve. During this time tricuspid annuloplasty (TA) was performed in 137 patients and the tricuspid valve was replaced (TVR) in 101 patients. Comparison of hospital mor...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1976-12-01 00:00:00
abstract::Absence of continuity between the heart and the pulmonary arteries has the potential for total correction. When the pulmonary arteries are narrow, a palliative first stage systemic-pulmonary arterial anastomosis serves to enlarge the pulmonary arteries so that, with time, they become of adequate caliber for total corr...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.5.834
更新日期:1976-11-01 00:00:00
abstract::The echographic isovolumic contraction time (ICT) of the left ventricle (LV) was measured in order to assess alterations of LV performance in children with various forms of cardiac disease. The echographic ICT was defined as the interval between coaptation of the anterior and posterior mitral valve leaflets and aortic...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.5.751
更新日期:1976-11-01 00:00:00
abstract::The effects of verapamil (0.02-0.2 mg/kg) on contractility in normal and partially ischemic myocardium were compared with the changes following propranolol (0.01-1.0 mg/kg). Regional contractile function was studied in open-chest dogs with ultrasonic crystals and ischemia was controlled by graded occlusion of a caroti...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.4.629
更新日期:1976-10-01 00:00:00
abstract::Instantaneous aortic arch blood velocity was recorded transcutaneously from the suprasternal notch, using a 2.2 MHz Doppler ultrasound unit, in 18 normals and 16 patients undergoing cardiac catheterization who had murmurs of mitral regurgitation. In normals aortic blood velocity rose rapidly in early systole to a mids...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.54.4.656
更新日期:1976-10-01 00:00:00
abstract::Certain clinical and morphologic observations are described in 27 patients with severe isolated angina pectoris of either the stable (five patients) or the unstable form (22 patients). Twenty-four patients died during or shortly after cardiac operations designed to relieve angina pectoris and three died during cardiac...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.3.388
更新日期:1976-09-01 00:00:00
abstract::The pathogenesis of paradoxical hypertension after resection of coarctation of the aorta was investigated by comparing the course of seven children undergoing repair of coarctation with five acyanotic children undergoing elective cardiovascular surgery. During the first 24 hours after surgery, all coarctation patients...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.3.382
更新日期:1976-09-01 00:00:00
abstract::Retrograde coronary artery flow was observed angiographically in 43 patients with aortic stenosis and/or regurgitation. In the 24 patients with pure or predominant aortic stenosis, retrograde flow was seen in all 24 during end-systole. In the eight patients with pure aortic regurgitation, retrograde flow was seen main...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.3.494
更新日期:1976-09-01 00:00:00
abstract::An isolated perfused working rat heart model was used to investigate the extent to which various protective agents, used either singly or in combination, were able to increase the resistance of the heart to periods of transient ischemia. The aim of the studies was to develop a solution which, if infused into the coron...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.2.193
更新日期:1976-08-01 00:00:00
abstract::Vasodilatory or vasoconstrictive renal pharmacoangiography was applied in investigating the significance of 50 renal artery stenoses. The technique involves comparison of selective magnification renal arteriograms before and after intra-arterial injection of epinephrine or acetylcholine, seeking changes in direction o...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.2.328
更新日期:1976-08-01 00:00:00
abstract::A technique is described to control recurrent or sustained supraventricular tachycardia associated with rapid ventricular rates following open heart surgery. The technique utilizes a pair of temporarily implanted atrial epicardial wire electrodes to pace the heart. In one group of patients with recurrent atrial flutte...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.2.245
更新日期:1976-08-01 00:00:00
abstract::Heart potentials were recorded from the entire chest surface in 42 patients suffering from Wolff-Parkinson-White syndrome. We were able to identify six types of surface maps, according to the location of the potential maximum and minimum during the delta wave. For each of these types we suggested the most likely locat...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.2.251
更新日期:1976-08-01 00:00:00
abstract::For half a century the systolic click and late systolic murmur lay dormant as innocent auscultatory curiosities. The thirteen years since Barlow related these phenomena to mitral leaflet prolapse have witnessed an astonishing information explosion. We have sought to bring together the accumulated data in this review. ...
journal_title:Circulation
pub_type: 杂志文章,评审
doi:10.1161/01.cir.54.1.3
更新日期:1976-07-01 00:00:00
abstract::Prognostic stratification was carried out on 518 patients less than or equal to 65 years of age who were discharged from the hospital following a definite or probable acute myocardial infarction and followed for four months. The total population was made up of 272 patients hospitalzed in 1973 and 246 patients hospital...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.1.58
更新日期:1976-07-01 00:00:00
abstract::Noninvasive gated cardiac blood pool imaging with technetium-99m autologous erythrocytes was employed to differentiate reversible verus irreversible abnormal ventricular segmental contraction by regional wall and pump responses to sublingual nitroglycerin in 25 patients with chronic coronary heart disease. In 12 patie...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.6.975
更新日期:1976-06-01 00:00:00
abstract::Aortic root motion was studied in 24 normal volunteers at rest and during the Valsalva maneuver, isometric exercise, and amyl nitrite inhalation. In addition root motion was correlated with the stroke volumes determined at cardiac catheterization in 24 patients. The root has distinct systolic movement, the amplitude a...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.6.947
更新日期:1976-06-01 00:00:00
abstract::Multiple areas of concealed intraventricular conduction are deduced on the basis of aftereffects observed in His bundle recordings. Electrocardiograms and His bundle recordings are presented from two patients with unstable bilateral bundle branch block, the instability of which depended on the interval at which ventri...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.5.776
更新日期:1976-05-01 00:00:00
abstract::Echocardiography was used to study left ventricular size and contraction in 128 patients with isolated aortic valve disease -45 patients with aortic stenosis, 25 with mixed aortic valve disease and 58 with aortic regurgitation. Left ventricular measurements included the end-diastolic internal dimension (LVIDd), mural ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.5.860
更新日期:1976-05-01 00:00:00
abstract::Eighteen of 388 patients with chronic bundle branch block, studied electrophysiologically and followed prospectively, had H-V intervals of 80 msec or greater. Five patients were functional class I, five class II, seven class III, and one class IV. Follow-up ranged from 103 to 1919 days (mean 711 +/- 118). Three patien...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.4.600
更新日期:1976-04-01 00:00:00
abstract::Thirteen patients with proven Q fever endocarditis and three additional patients with probable endocarditis are reviewed. The most helpful diagnostic test is the demonstration of a high complement fixing antibody titre to Phase 1 antigen of Coxiella burneti. The macroscopic pathology of the aortic valve is described a...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.53.4.680
更新日期:1976-04-01 00:00:00
abstract::The evidence supporting the thesis that hypertension can be prevented by eliminating salt from the diet is based on four principal sources: (1) epidemiological studies in unacculturated peoples showing that the prevalence of hypertension is inversely correlated with the degree of salt intake; (2) hemodynamic studies s...
journal_title:Circulation
pub_type: 杂志文章,评审
doi:10.1161/01.cir.53.4.589
更新日期:1976-04-01 00:00:00