摘要:

To evaluate the relation between the anatomic extent of coronary artery disease (CAD) and exercise-induced thallium-201 perfusion abnormalities, we studied 63 patients (12 with no significant CAD; 24 with one-vessel disease; and 27 with multivessel disease). The extent of CAD was scored according to the severity and location of disease in the major coronary vessels and their branches: the higher the score, the more extensive the disease. The thallium images were scored in multiple segments in three projections; the higher the score, the smaller the perfusion abnormality.The CAD score was variable in patients with one-vessel disease (range 6–30, mean 14.7) and in patients with multivessel disease (range 17.5–45, mean 26.7). The extent of perfusion abnormality was smaller in patients with one-vessel disease than in patients with multivessel disease (25.1 ± 2.2 versus 22.4 ± 2.8, P < .05). However, there was considerable overlap between the two groups. Although there was a good correlation between the CAD score and thallium score (r = .79), there was considerable scatter in the thallium score for any given CAD score. The reasons for and implications of these findings are discussed.

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

Exercise stress testing is an important method for exposing ventricular premature beats (VPBs) and can also be used to assist in defining an effective antiarrhythmic prophylaxis for ventricular arrhythmia. We compared the provocation of VPBs in a standard exercise test (MXT) with provocation of VPBs in an abbreviated form of testing (Mini) that seemed to approximate more closely the demands of daily activities. The study involved 52 patients with known or suspected history of ventricular arrhythmia—42 men and ten women, average age 49 years. Hemodynamic and ST-segment changes were similar during both forms of testing. Thirty-seven patients (71%) undergoing MXT exhibited VPBs, whereas 32 (62%) did so during Mini testing. Of 13 patients with repetitive VPBs, MXT as well as Mini provoked the same degree of VPBs in ten. In two patients, the yield of these complex forms of VPBs was higher with Mini and in one patient with MXT. Thus, this abbreviated protocol may be useful for patients undergoing serial exercise studies to assess drug efficacy for the suppression of ventricular ectopic activity.

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

Cardiac Rehabilitation Programs is a regular feature in which the protocols of innovative and unique cardiac rehabilitation programs are described. The co-editors invite the staffs of other outstanding programs to submit descriptive articles concerning the financial, methodologic, and creative aspects of their program for possible publication in the journal.

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

Secondary prevention of coronary disease has traditionally involved primarily surgery and pharmacologic management. However, it has become increasingly evident that successful rehabilitation also involves modification of those overt behaviors that place cardiac patients at greater risk for reinfarction and death. “Behavioral medicine” is a new field concerned with the application of behavioral science knowledge to medical problems and holds particular promise for the area of cardiac rehabilitation. The present review summarizes the behavioral strategies currently employed to treat coronary patients, with particular attention paid to such interventions as exercise, dietary management, smoking cessation, psychotherapy, type A modification, and procedures to enhance patient compliance. The importance of a multidisciplinary approach to successful rehabilitation is emphasized:

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

The mechanism of bed rest—induced deconditioning associated with reduced exercise performance may be explained as a physiologic adaptation to minimal daily physical activity and/or to the reduction of regular cardiovascular orthostatic stress produced by our natural standing position. Regular exercise during bed rest has minimal positive effects on maintaining work performance if the individual remains supine. However, simulation of regular daily.exposure to the orthostatic stress of gravity provides significant effects against the increased cardiovascular stress induced by post-bed rest exercise. Furthermore, increases in heart rate-blood pressure product and reductions in oxygen transport and/or utilization are significantly greater during upright exercise than they are during supine exercise. The available data indicate that the inability of cardiovascular mechanisms to adequately compensate for the orthostatic stress induced by the upright posture is the most important factor limiting exercise performance after bed rest, particularly in middle-aged men. This mechanism also increases myocardial oxygen demands during submaximal effort after bed rest. Intermittent exposure to gravitational stress during the bed rest stage of hospital convalescence may obviate much of the deterioration in cardiovascular performance that follows myocardial infarction.

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0275-1429    

出版商:OVID    

年代:1983

数据来源: OVID