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::Medical treatment of heart disease has improved significantly in the past 30 years. The spectacular change in the natural history of rheumatic heart disease is apparent from a 1948 article that reported that 42% of children with rheumatic heart disease died of rheumatic infection or bacterial endocarditis. Antibiotics...
journal_title:Circulation
pub_type: 临床试验,历史文章,杂志文章
doi:10.1161/01.cir.60.7.1609
更新日期:1979-12-01 00:00:00
abstract::A histologic study was performed on 22 specimens of pulmonary atresia with ventricular septal defect to 1) ascertain the existence of the main pulmonary artery; 2) distinguish the ductus arteriosus from the systemic collateral arteries (SCA); 3) establish the nutritive or functional nature of collateral circulation; a...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.5.1066
更新日期:1979-11-01 00:00:00
abstract::The amplitude and distribution of epicardial ST-segment elevation (ST) were examined for an 8-hour period after coronary occlusion in eight baboons and five pigs. ST was determined from unipolar epicardial electrograms obtained from a high-resolution matrix of fixed electrodes overlying a transmural region of ischemia...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.4.930
更新日期:1979-10-01 00:00:00
abstract::The mechanism of atrial flutter is controversial. A 76-year-old woman with rheumatic heart disease was referred to our clinic with an unusual rhythm disturbance which initially appeared to be classic atrial flutter at a rate of 300 beats/min. Later tracings, however, demonstrated a rate exactly one-half that of the ea...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.3.711
更新日期:1979-09-01 00:00:00
abstract::Patients with idiopathic hypertrophic subaortic stenosis (IHSS) have supernormal left ventricular systolic function at rest. Septal myotomy/myectomy reduces outflow obstruction and symptoms. However, it has been proposed that operation causes myocardial damage, with consequent reduction in left ventricular function an...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.82
更新日期:1979-08-01 00:00:00
abstract::To define the factors influencing the success of emergency ventricular defibrillation, we identified 52 patients defibrillated at the University of Iowa Hospital during 1974--1976. Thirty-eight patients were successfully defibrillated at least once; 14 could not be defibrillated, despite multiple attempts. Comparisons...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.226
更新日期:1979-08-01 00:00:00
abstract::Two-dimensional echocardiography can provide serial cross-sectional images of the left ventricular cavity. We examined whether such serial images from steady-state ejecting hearts would allow three-dimensional reconstruction and accurate volume estimation without major geometric assumptions. Cross-circulated, paced do...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.320
更新日期:1979-08-01 00:00:00
abstract::Paroxysmal supraventricular tachycardia (PSVT) is commonly caused by reentry within the atrioventricular (AV) node. This arrhythmia was abolished by operative dissection of the AV junction in a patient with disabling tachycardia that was not controlled by drugs. The operation was intended to create complete AV block, ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.440
更新日期:1979-08-01 00:00:00
abstract::A consecutive series of 17 patients surgically treated for asymptomatic coronary artery disease was surveyed for survival, clinical status, and graft patency after a mean follow-up of 75 months. Documented myocardial infarction (MI), 14 transmural and 3 subendocardial, was the major indication for catheterization. All...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.14
更新日期:1979-08-01 00:00:00
abstract::Nine children ages 2--15 years have undergone mitral valve replacement (MVR) with Hancock porcine heterograft valves for severe mitral insufficiency. The etiology of the mitral valve disease was rheumatic in two patients, and congenital in seven. Porcine valve sizes ranged from 19--31 mm. Follow-up has been from 1.6 t...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.98
更新日期:1979-08-01 00:00:00
abstract::In 69 patients undergoing coronary artery bypass grafting for complete coronary revascularization, blood flow was measured in 140 grafts with 243 distal anastomoses (3.52 bypasses/patient). Total blood flow in single grafts and double and triple sequential grafts did not differ significantly, although mean distal flow...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.2.33
更新日期:1979-08-01 00:00:00
abstract::The dynamics of acute mitral regurgitation were studied in six open-chest dogs in whom a portion of the anterior leaflet was excised. Phasic mitral and aortic flows were measured electromagnetically and left ventricular filling volume, regurgitant volume (RV) and forward stroke volume (SV) were calculated. The systoli...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.1.170
更新日期:1979-07-01 00:00:00
abstract::Eighty-six of 452 patients (19%) with chronic bifascicular block were found to have no clinically apparent associated organic heart disease (OHD) and were defined as having primary conduction disease (PCD). Comparison of patients with PCD and OHD revealed a significantly lower incidence of the following clinical varia...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.60.1.33
更新日期:1979-07-01 00:00:00
abstract::Resting hemodynamics improve during vasodilator administration in patients, with congestive heart failure (CHF), but the effects of these agents on exercise is unknown. Twenty-two patients with class II or III CHF performed bicycle exercise to symptomatic maximum before and 90 minutes after random double-blind adminis...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1161/01.cir.59.6.1085
更新日期:1979-06-01 00:00:00
abstract::Various electrocardiographic and vectorcardiographic (ECG-VCG) patterns of ventricular conduction disturbances are inducible by premature right atrial stimulation (PRAS). These patterns are a consequence of different degrees of refractoriness in the specialized ventricular conduction system. We observed that the inter...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.5.1044
更新日期:1979-05-01 00:00:00
abstract::It has been suggested that the rate of left ventricular (LV) relaxation is related to the inotropic state, end-systolic fiber length and peak LV pressure, but little information is available regarding the rate of LV relaxation in patients with coronary artery disease (CAD) and LV dysfunction. To assess the rate of LV ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.5.984
更新日期:1979-05-01 00:00:00
abstract::Thirty patients with triple-vessel coronary artery disease proven by angiography, symptomatic angina and a positive ECG stress test were evaluated with thallium-201 (201TI) scintigraphy. Twenty patients also had aortocoronary saphenous vein bypass surgery; 15 of them had repeat noninvasive evaluation. Seventy percent ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.4.714
更新日期:1979-04-01 00:00:00
abstract::Serial sections of the conduction system (CS) were performed in two patients with recurrent tachyarrhythmias. Case 1, a 34-year-old female who had dual atrioventricular (AV) nodal pathways with recurrent paroxysmal supraventricular tachycardia, committed suicide. Autopsy revealed an abnormally formed atrial septum wit...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.3.593
更新日期:1979-03-01 00:00:00
abstract::Verapamil, a calcium antagonist, has been used extensively for treatment of cardiac arrhythmias. Concern persists, however, that it may seriously depress myocardial function in cardiac patients. To investigate this possibility, 20 patients with coronary artery disease (CAD) but no heart failure were given intravenous ...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.59.2.313
更新日期:1979-02-01 00:00:00
abstract::Suckling Swiss Webster mice were inoculated with 10(4)TCD50 of coxsackieviruses, group B types 1 or 4. Virulent necrotizing myocarditis resulted in 185 infected mice. Of the latter group, three (14.3%) nurslings on the 17th and 23rd day after inoculations had left ventricular aneurysms postmortem. None of 61 concurren...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.2.412
更新日期:1979-02-01 00:00:00
abstract::The electrophysiologic effects of intravenously administered disopyramide (2 mg/kg) on three parameters of sinus node function were examined in 16 symptomatic patients with sinus node dysfunction. Based on their ECG data before study, patients were subdivided into group A (n = 8), those with sinus pauses and/or sinoat...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.2.226
更新日期:1979-02-01 00:00:00
abstract::Twenty-six major cardiovascular centers participated in a cooperative study of all cases of infective endocarditis occurring during a single calendar year to obtain an overview of infective endocarditis. The study was designed to learn which patients appear to be at highest risk to develop this infection after palliat...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.2.327
更新日期:1979-02-01 00:00:00
abstract::We assessed the effects of ethanol and autonomic blockade on left ventricular function in nine normal subjects, age 20--35 years, using M-mode echocardiography and systolic time intervals. On day 1, measurements were made of heart rate, mean velocity of circumferential fiber shortening, and left ventricular pre-ejecti...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.59.1.120
更新日期:1979-01-01 00:00:00
abstract::The anatomy of 58 specimens of aortic outflow tract atresia was studied. All cases had situs solitus and levocardia, 37 had atrioventricular (AV) concordance, two had common inlet to a right ventricle and 19 had mitral atresia. The great arteries were normally interrelated in all cases. Fifty-one cases had an intact v...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.59.1.173
更新日期:1979-01-01 00:00:00
abstract::In studies to ascertain the basis of dynamic changes in the P wave, bipolar epicardial potentials were recorded from multiple atrial electrodes in dogs. One hundred to 120 activation times were displayed by a digital computer and used to construct atrial isotemporal activation sequence maps. Changes in heart rate or b...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.6.1036
更新日期:1978-12-01 00:00:00
abstract::To study the variability of the fraction of CPK released from the infarcted heart which enters the serum (serum entry ratio, or SER) with size and model of infarction, nine dogs underwent homogeneous infarctions (LAD ligation) of varying sizes, and 10 dogs underwent scattered infarctions (left coronary embolization). ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.6.1143
更新日期:1978-12-01 00:00:00
abstract::Malignant hyperthermia is a disease resulting from defective cellular membranes, usually presenting as drug-induced pyrexic crises. We describe four patients with life threatening ventricular arrhythmias or chest pain in the absence of pyrexic crises. Three presented with life threatening arrhythmias and the fourth wi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.5.916
更新日期:1978-11-01 00:00:00
abstract::Although the postoperative hemodynamic and echocardiographic features of idiopathic hypertrophic subaortic stenosis have been studied, the expected consistent postoperative thinning of the interventricular septum has not been reported. In this study, the short-term effects of septal myectomy were evaluated in 16 patie...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.5.850
更新日期:1978-11-01 00:00:00
abstract::The indication for prophylactic temporary and permanent pacing during acute myocardial infarction (MI) complicated by bundle branch block is high risk of progression via a Type II pattern to second or third degree (high degree) AV block during hospitalization or follow-up. In this study, determinants of high degree AV...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.4.689
更新日期:1978-10-01 00:00:00
abstract::Eight cases of ventricular parasystole are reported. In all these cases, regardless of whether parasystole seems intermittent or "continuous," the presence of second degree entrance block of the Mobitz type I was suggested. Parasystole alternated with concealed extrasystolic bigeminy showing occasional reentrant extra...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.4.715
更新日期:1978-10-01 00:00:00
abstract::Variations in the frequency of ventricular premature depolarizations (VPDs) were evaluated with three consecutive 24-hour long-term electrocardiography monitor recordings from 15 clinically stable patients with various cardiac disorders. Mean hourly VPD frequencies ranged from 37--1,801 per hour. Data were subjected t...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.3.408
更新日期:1978-09-01 00:00:00
abstract::Scanning and transmission electron microscopic studies were made of: 1) 15 glutaraldehyde-treated porcine valvular heterografts that had been implanted in patients for periods of time ranging from 2 days to 76 months; 2) unimplanted, commercially processed porcine aortic valves; and 3) unprocessed porcine aortic valve...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1978-09-01 00:00:00
abstract::The effect of stenosis of the left main and proximal anterior descending coronary arteries on anterior left ventricular wall dynamics was investigated in 70 patients with ischemic heart disease by the use of roentgen videometric analysis of left ventricular angiograms. In all patients with ischemic heart disease, mean...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.3.491
更新日期:1978-09-01 00:00:00
abstract::Twenty-six patients with unstable angina pectoris had biplane left ventricular (LV) angiograms and coronary arteriograms (CAGs) initially and at a median of 1 year following randomization to medical (15 patients) or surgical 11 patients) therapy. Left ventricular segmental wall motion was analyzed by a digital compute...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1978-09-01 00:00:00
abstract::Separate effects of perfusion hypothermia, potassium arrest, and procaine arrest were studied in 150 hearts using the isolated rat heart preparation. Aortic flow rate (AFR), coronary flow rate (CFR), and heart rate (HR) were measured before and after ischemic periods of 90 to 300 min. Prior to the ischemic period, the...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1978-09-01 00:00:00
abstract::The effectiveness of intra-aortic balloon pumping in augmenting ventricular performance during acute myocardial ischemic syndromes was determined by noninvasive multigated cardiac blood pool imaging. Nine patients with unstable angina refractory to medical therapy and nine patients with acute myocardial infarction com...
journal_title:Circulation
pub_type: 杂志文章
doi:
更新日期:1978-09-01 00:00:00
abstract::To assess the effects of moderate potassium cardioplegia (37 mEq/l KCl) on the severity of myocardial ischemia during arrest and on post arrest ventricular function, 32 isolated, isovolumic feline hearts were studied before, during and 1 hour after ischemic arrest. Normothermia (37 degrees C) was maintained in the rem...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.2.240
更新日期:1978-08-01 00:00:00
abstract::The administration of hyaluronidase is a promising intervention to protect the ischemic myocardium in man, but evidence of the extent to which it may reduce the ultimate size of an infarct is not well-defined. Hence, open chest, anesthetized dogs were randomized into 10 control dogs which received saline and eight tre...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.2.220
更新日期:1978-08-01 00:00:00
abstract::We have applied the new technique of dual echocardiography to determine the sequence of atrial contraction as reflected in the simultaneously recorded movements of the tricuspid and mitral valves. The study group included 29 normal subjects and 23 patients with either atrial flutter, coarse atrial fibrillation or atri...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.2.314
更新日期:1978-08-01 00:00:00
abstract::Nineteen patients with chronic low output cardiac failure were studied before, during and after infusion of phentolamine in doses of 10, 20, 30 and 40 microgram/kg/min. Significant reduction of left- and right-sided pressures and increases in cardiac index and heart rate (HR) were present within 15 minutes of starting...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.58.1.157
更新日期:1978-07-01 00:00:00