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Related Concept Videos

Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are not...

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Updated: May 24, 2026

A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats
07:41

A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats

Published on: March 1, 2022

Aging and cardiopulmonary interactions: physiologic and pathophysiologic consequences.

Eduardo Butturini de Carvalho1,2, Felipe Cavalcante Brambila de Barros3, Nazareth N Rocha2,4

  • 1Vassouras University, Rio de Janeiro, Brazil.

American Journal of Physiology. Heart and Circulatory Physiology
|May 22, 2026
PubMed
Summary
This summary is machine-generated.

Assessing fluid responsiveness in older adults is challenging due to age-related changes and comorbidities. Understanding these factors is crucial for safe and effective fluid management in this population.

Keywords:
critical careelderlyemergency departmentfluid responsivenesshemodynamic parameters

Related Experiment Videos

Last Updated: May 24, 2026

A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats
07:41

A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats

Published on: March 1, 2022

Area of Science:

  • Gerontology
  • Cardiovascular Physiology
  • Critical Care Medicine

Background:

  • Hemodynamic monitoring is vital for hospitalized patients to ensure tissue perfusion and prevent organ dysfunction.
  • Cardiopulmonary interactions are the basis for bedside hemodynamic indexes.
  • Assessing fluid responsiveness in older adults presents unique challenges due to age-related physiological changes and comorbidities.

Purpose of the Study:

  • To review the physiological consequences of aging on hemodynamic assessment.
  • To highlight the difficulties in evaluating fluid responsiveness in the aging population.
  • To emphasize the need for age-specific approaches in hemodynamic monitoring research.

Main Methods:

  • This is a narrative review.
  • It synthesizes existing literature on aging, physiology, and hemodynamic monitoring.
  • It discusses the impact of common comorbidities in older adults on fluid responsiveness assessment.

Main Results:

  • Aging alters cardiopulmonary interactions, complicating hemodynamic monitoring.
  • Conditions like heart failure with preserved ejection fraction and aortic stenosis in older adults can confound fluid responsiveness assessments.
  • The therapeutic window for intravenous fluid administration is narrowed in older adults.

Conclusions:

  • Current hemodynamic monitoring formulas and clinical studies often neglect age-related physiological adaptations.
  • A phenotype-oriented approach is needed for future research, stratifying older adults based on age-related changes and prevalent conditions.
  • Tailored research and data analysis are essential for improving hemodynamic management in the aging population.