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Comparison of Cardiac Pacing Modes in Patients With Chronic Obstructive Pulmonary Disease – Discussion
Dyspnea with exertion is a commonly recognized complaint in patients with lung disease. An increasing perception of shortness of breath with exercise is consistent with severe lung disease and frequently results in a fear of exertion that not only limits any activity requiring exertion, but daily living activities as well. The limitation of physical activities […]
Comparison of Cardiac Pacing Modes in Patients With Chronic Obstructive Pulmonary Disease – Results
All patients with COPD had sinus node dysfunction, including four with chronotropic incompetence. All had AV nodal disease, three 3° AV block, four 1° AV block, and one 2° AV block. Three of these patients had documented retrograde conduction and a history of pacemaker syndrome in the WI mode. However, only one of these patients […]
Comparison of Cardiac Pacing Modes in Patients With Chronic Obstructive Pulmonary Disease – Methods
Spirometry was used to evaluate baseline lung function for each patient. This was performed prior to exercise, with the patient standing. Patients were required to perform three reproducible forced expiratory and inspiratory maneuvers. All patients were then evaluated with paired exercise testing using the Chronotropic Assessment Exercise Protocol Pulmonary gas exchange, exercise duration, heart rate, […]
Comparison of Cardiac Pacing Modes in Patients With Chronic Obstructive Pulmonary Disease – Patient Population
Limitations in exercise tolerance are a common manifestation of patients with chronic lung disease. Compromised pulmonary mechanics limit the ability of the lungs to respond to increasing oxygen demands. This leaves these patients dependent on other mechanisms to deliver available oxygen to the tissues to support the metabolic demands of exercise. Optimizing cardiac output is, […]