Intro to Geriatrics Flashcards
Anatomical changes in the CV system
decreased contraction and filling capacity → less CO
Physiological changes in the CV system
changes in conduction → tachy and bradyarrhythmias, decreased efficiency, decreased catecholamines
Changes in the conduction system of the heart
decreased due to fibrosis or ischemia, “irritable” → trigger → increased HR → tachyarrhythmias.
Generally slows down
Arterial changes in the CV system
increased stiffness, atherosclerosis
Venular changes in the CV system
decreased valves, thrombosis, PE
Disease r/t aging CV system
HTN, TIA/CVA (carotid- occlusion, vertebral- hypotension)
CNS changes in the elderly: conduction and transmission
moving slower and not as strong → results in not having the same coordination or muscle control
CNS changes: threshold for arousal
Blurred, needs a greater signal
CNS changes: adaptation to physiologic stressors
Reduced
CNS changes: recovery time in autonomic system
Increased time needed to return to baseline
Respiratory changes in the elderly
Normal at rest, compromised under stress
Anatomical changes in the respiratory system
decreased expiration → decreased elasticity, muscle weakness, skeletal deformities and reduced capacity of lungs
Functional changes in the respiratory system
decreased ventilation and PaO2
Anatomical changes in the kidneys
Nephron degeneration
Physiologic changes in the kidneys
decreased ability to concentrate urine, decreased renal blood flow, decreased acid-base adaptation when stressed