Case report: A proposed role for cardiopulmonary exercise testing in detecting cardiac dysfunction in asymptomatic at-risk adolescents.

Noninvasive cardiopulmonary exercise testing (CPET) provides the valuable capacity to analyze pulmonary gas exchange and cardiovascular responses that can be used to differentiate normal cardiopulmonary responses from abnormal. This case report highlights a proposed role for CPET in identifying potential cardiac pathologies in at-risk adolescents. An abnormal CPET response in an asymptomatic adolescent revealed a family history of early-age CAD.

Correction: Cardiopulmonary exercise testing.

In the article, "Cardiopulmonary exercise testing: A contemporary and versatile clinical tool" (Leclerc K, Cleve Clin J Med 2017; 84:161-168), an error occurred in Table 1. Heart rate reserve was defined as maximum heart rate minus resting heart rate. It should be defined as (maximum heart rate minus resting heart rate) divided by (predicted maximum heart rate minus resting heart rate).

Cardiopulmonary exercise testing: A contemporary and versatile clinical tool.

Cardiopulmonary exercise testing (CPET) helps in detecting disorders of the cardiovascular, pulmonary, and skeletal muscle systems. It has a class I (indicated) recommendation from the American College of Cardiology and American Heart Association for evaluating exertional dyspnea of uncertain cause and for evaluating cardiac patients being considered for heart transplant. Advances in hardware and software and ease of use have brought its application into the clinical arena to the point that providers should become familiar with it and consider it earlier in the evaluation of their patients.

Comparison of Predicted Exercise Capacity Equations and the Effect of Actual versus Ideal Body Weight among Subjects Undergoing Cardiopulmonary Exercise Testing.

Background. Oxygen uptake at maximal exercise (VO2 max) is considered the best available index for assessment of exercise capacity. The purpose of this study is to determine if the use of actual versus ideal body weight in standard regression equations for predicted VO2 max results in differences in predicted VO2 max.

Direct admission to cardiology for patients hospitalized for atrial fibrillation reduces length of stay and increases guideline adherence.

Objective: We hypothesized that a clinical pathway for inpatient management of atrial fibrillation on a cardiology service would result in improved resource utilization.

Methods: In July 2002, an evidence-based pathway was developed for treatment of patients hospitalized for atrial fibrillation. Guidelines directed patient care from admission from the emergency department to inpatient management on a cardiology service.

Biomechanical efficiency is decreased in heart failure during low-level steady state and maximal ramp exercise.

Background: Previous studies of biomechanical efficiency (external work/energy input--Watt/O(2) consumed) in heart failure (HF) using cardiopulmonary exercise testing (CPET) and magnetic resonance spectroscopy (MRS) have had discordant results with increased efficiency by CPET and decreased efficiency by MRS.

Aims: Compare biomechanical efficiency of HF subjects and normal controls during steady state (SS=35 W for 6 min) and ramp cycle ergometer exercise. The hypothesis was that HF subjects would have impaired biomechanical efficiency that correlated with HF symptoms.

Utility of magnetic resonance imaging in cardiac venous anatomic variants.

The incidence of persistent left superior vena cava (PLSVC) is approximately 0.5% in the general population; however, the coexistent absence of the right SVC has a reported incidence in tertiary centers of 0.1%.

Oxygen cost of exercise is increased in heart failure after accounting for recovery costs.

Study Objectives: The oxygen cost during exercise has been reported to be decreased in patients with congestive heart failure (CHF), implying an increased efficiency (lower oxygen uptake [VO(2)] per Watt [VO(2)/W]); however, these studies ignored the oxygen debt that is increased in heart failure.

Subjects: The primary aim of this research was to evaluate the total oxygen cost (work VO(2)/W) during exercise and recovery in patients with heart failure as compared with healthy adults.

Design And Patients: We performed a retrospective analysis comparing the exercise VO(2)/W, the recovery VO(2)/W, the work VO(2)/W, and the VO(2)/W relationship above and below the ventilatory threshold (VT) in 11 healthy control subjects and 45 patients with CHF.

Research and commentary: Change in exercise tolerance, activity and sleep patterns, and quality of life in patients with cancer participating in a structured exercise program.

Purpose/objectives: To investigate the feasibility of an exercise program patterned after a phase II cardiac rehabilitation program to improve selected physiologic and psychological parameters of health in patients with cancer.

Design: Prospective, repeated measures study.

Setting: Two major military medical centers in the southwestern United States.

The role of norepinephrine in exercise impairment in congestive heart failure.

Congestive heart failure is a disorder that includes a multitude of neurohormonal responses that become maladaptive over time. Chronic sympathetic stimulation adversely affects the well-being and survival of heart failure patients and contributes to the exercise intolerance frequently seen in these patients. Norepinephrine levels have been correlated with poorer survival in heart failure patients.