ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

Six cases of atrial infarction associated with ventricular infarction are presented. All cases were diagnosed during life and were confirmed by autopsy.A clinical diagnosis of atrial infarction should be suspected in patients with ventricular myocardial infarction having any form of atrial arrhythmia. Frequent electrocardiograms should be obtained, especially if sinus rhythm has just been re-established after episodes of supraventricular tachycardia or atrial fibrillation.Themajorelectrocardiographic criteria for the diagnosis of atrial infarction are as follows: elevation of the P-Ta segment of over 0.5 mm. in V5; and V6with reciprocal depression of the same segment in V1and V2; elevation of the P-Ta segment of over 0.5 mm. in lead I and its depression in leads II or III; depression of the P-Ta segment of more than 1.5 mm. in precordial leads and 1.2 mm. in leads I, II, and III in the presence of any form of atrial arrhythmia.Theminorelectrocardiographic criteria in making the diagnosis of atrial infarction are as follows: abnormal P waves: M-shaped, W-shaped, irregular or notched; depression of the P-Ta segment of small amplitude without elevation of this segment in other leads cannot be regarded by itself as positive evidence of atrial infarction.A diagnosis of atrial infarction can sometimes be made when the presence of ventricular myocardial infarction cannot be definitely established by electrocardiogram.The treatment of atrial infarction is similar to that of ventricular infarction. Attention should be directed to the control of atrial arrhythmias and to the prevention of mural thrombi.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

The clinical and hemodynamic findings in 10 patients with mitral insufficiency on a congenital basis are described.Six of these patients have had repair of the defects with dramatic clinical improvement noted. The findings at the time of surgical repair have been summarized.The severity of the symptoms and the benefits to be derived from surgical repair should encourage vigorous attempts to establish the correct diagnosis. This is best accomplished by either recording the typical left atrial pressure pulse of mitral insufficiency during left heart catheterization or by left ventricular angiography to demonstrate the regurgitation of contrast material into the left atrium.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

Five cases of postoperative aneurysm of the ductus arteriosus are presented and discussed, together with 12 from the literature. The ductus had become recanalized in all 17 patients. Infection was present in 11, having existed preoperatively in only two of these cases. The evidence suggests that contamination at the time of surgery was responsible for the infection in at least seven cases.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

Eleven cases with acute hemorrhage and necrosis of the bowel are described. In all cases there was high dosage of digitalis and definite toxicity in seven. Digitalis was considered as the main associated factor, especially since there was no mesenteric arterial involvement and, in four cases, there was no congestive failure at autopsy. Hepatic vein or sinusoidal sphincter constriction with resulting portal splanchnic venous congestion was considered as possible mechanisms by which digitalization produced this syndrome.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

The myocardial and peripheral hemodynamic effects of cigarette smoking have been assessed during a steady state situation in a group of normal subjects, and compared with a group of patients with coronary artery disease.During smoking, in both groups there was augmentation of heart rate, systemic arterial pressure, and left ventricular work, this response being somewhat greater in the coronary patients. Despite these hemodynamic alterations, neither group had a significant change in coronary blood flow, so that myocardial oxygen usage remained virtually identical with the value before smoking. There was no evidence of myocardial ischemia in the coronary subjects during smoking. The various factors, potentially responsible for the lack of myocardial blood flow increment are considered.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

Femoral arteries, abdominal aortas, one renal artery, and one coronary artery removed from patients injected with P32phosphate showed in most instances an active incorporation of the label into the phospholipids of intima and adventitia. A comparison of the specific activities of arterial plaque and plasma phospholipids suggests that the excess arterial phospholipids are originally derived from synthesis by the arterial wall, or at least undergo continuous renewal in situ.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

The effects of triiodothyronine (T3) administration on digitalis requirements was studied in a group of patients with atrial fibrillation. The ventricular rate was utilized to provide a quantitative expression of digitalis effect. In one patient the amount of acetylstrophanthidin, administered as a constant infusion, required to slow the ventricular rate to 70 beats per minute rose from an average of 0.58 mg. while he was myxedematous, to 1.50 mg. when he was euthyroid. When mild thyrotoxicosis was induced in three euthyroid patients the daily dose of digoxin had to be increased approximately four-fold in order to maintain the ventricular rate at a control level. In three patients it was observed that reserpine or syrosingopine administered intramuscularly abolished the increased requirements for digoxin induced by T3. In two patients syrosingopine was found to prevent partially the tachycardia resulting from large doses of intravenous T3. The possible mechanisms responsible for these effects and their therapeutic implications are discussed.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

Surface "fusion beats", beats with initial and terminal QRS abnormalities, and accompanying secondary ST-T-wave changes appear following intracavitary evidence of premature depolarization. In instances of premature activation of a portion of myocardium, the intracavitary deflection of premature ventricular depolarization may not be apparent in surface leads and, if present, may be reflected in surface leads only by subtle changes in wave configuration that include (1) shortening of the P-R interval, (2) prolongation or amplitude changes or both in the QRS, (3) changes in contour of initial and terminal portion of the QRS, sometimes resembling those of infarction, and (4) secondary ST-T-wave changes. Evidence of electrical asynchronism in a single ventricle and between ventricles is presented.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID

摘要:

A dye-dilution method devised to estimate the individual outputs of the ventricles has been used to assess the magnitude of the flow through bronchial-pulmonary anastomoses in patients with chronic lung disease. In 10 normal subjects the output of the left ventricle was, on the average, 0.9 per cent larger than the output of the right. In six patients with advanced pulmonary tuberculosis, the average value was 2.9 per cent, and in 11 patients with bronchiectasis 9.3 per cent. One patient, who had had her left main pulmonary artery ligated, exhibited an anastomotic flow of 20 per cent. In all groups the flow calculated from the Fick equation agreed within 20 per cent with that from the right ventricle. In the normal subjects and the patients with tuberculosis, the same general agreement between the Fick and the left ventricular output was observed. But in the patients with bronchiectasis and the woman with the ligated pulmonary artery, the Fick calculation underestimated the left ventricular output. This underestimation suggests that the blood traversing the bronchial-pulmonary anastomoses had an oxygen content approximating that in the systemic arterial blood.

ISSN:0009-7322    

出版商:OVID    

年代:1961

数据来源: OVID