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Related Concept Videos

Ischemic Heart Disease: Overview01:17

Ischemic Heart Disease: Overview

Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
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...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.

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Related Experiment Video

Updated: Jul 10, 2026

Use of a Hanging Weight System for Coronary Artery Occlusion in Mice
08:30

Use of a Hanging Weight System for Coronary Artery Occlusion in Mice

Published on: April 19, 2011

Ischemic preconditioning depends on age and gender.

S Turcato1, L Turnbull, G-Y Wang

  • 1University of California, San Francisco, VA Medical Center, Cardiology Division 111C, 4150 Clement St, San Francisco, CA 94121, USA.

Basic Research in Cardiology
|February 2, 2006
PubMed
Summary

Ischemic preconditioning improves heart recovery in older female mice. Female hearts show greater protection against injury, possibly due to increased Akt signaling, with age influencing preconditioning effects.

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Area of Science:

  • Cardiovascular Physiology
  • Ischemic Preconditioning Research
  • Sex Differences in Cardiac Function

Background:

  • Previous research indicated ischemic preconditioning (IPC) was ineffective in 10-week-old female mouse hearts.
  • Understanding sex-based differences in cardiac response to ischemia is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the efficacy of an IPC protocol on post-ischemic functional recovery in female mouse hearts.
  • To compare the effects of IPC on male and female hearts across different age groups (10 and 18 weeks).

Main Methods:

  • Utilized Langendorff-perfused hearts from male and female mice at 10 and 18 weeks of age.
  • Subjected hearts to 45 minutes of ischemia followed by 45 minutes of reperfusion (I/R), with IPC involving a 3-minute ischemic pretreatment.
  • Measured hemodynamic parameters, infarct size, and levels of phosphorylated Akt (p-Akt).

Main Results:

  • IPC improved recovery of left ventricular developed pressure (LVDP) in 10-week-old males but not females, consistent with prior findings.
  • In 18-week-old mice, IPC doubled LVDP recovery in both males and females.
  • Female hearts exhibited greater LVDP recovery and higher p-Akt levels than male hearts at both ages.

Conclusions:

  • Findings support the concept that ischemia-induced preconditioning can occur in female hearts, but is age-dependent.
  • Female hearts possess greater inherent resistance to ischemic injury, potentially mediated by enhanced p-Akt signaling pathways.