hjärtlungfunktionspåverkan

Heart–lung function, or cardiopulmonary function, refers to the integrated performance of the heart and lungs in delivering oxygen to tissues and removing carbon dioxide. It depends on the heart’s ability to pump blood (cardiac output and stroke volume), the lungs’ capacity to ventilate and exchange gases, and the arterial oxygen content carried by hemoglobin. In Swedish usage, the concept is referred to as hjärt-lungfunktion or hjärtlungfunktion, reflecting the same physiologic integration.

Assessment of heart–lung function involves multiple measures. Cardiac function is described by cardiac output, heart rate, and ejection fraction, while pulmonary function is evaluated with spirometry and diffusion capacity testing. A comprehensive view is often obtained with cardiopulmonary exercise testing (CPET), which assesses oxygen uptake (VO2), carbon dioxide production, and ventilatory efficiency during progressive exercise. These tools together help depict how well the cardiovascular and respiratory systems support activity and rest.

Normal heart–lung function supports adequate exercise tolerance, organ perfusion, and metabolic demands. Impairment can arise from cardiovascular diseases (for example, heart failure or ischemia), pulmonary diseases (such as COPD or interstitial lung disease), pulmonary hypertension, anemia, or metabolic disorders. Evaluation is essential in preoperative risk assessment, critical care, and rehabilitation planning.

Lifestyle factors and training influence function. Regular aerobic exercise can improve VO2 max and ventilatory efficiency, while aging commonly reduces maximal capacity. Understanding heart–lung function aids diagnosis, management, and monitoring across health and disease.