[Biomechanics of the circulatory system and its pharmacological modulation]

K Nakayama1, K Ishii, Y Tanaka

  • 1Department of Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Japan.

Insights

Biomechanical forces from blood flow and heart contractions influence cardiovascular health. Understanding these hemodynamic stimuli is key to developing new treatments for conditions like hypertension and atherosclerosis.

Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering

Background:

  • Cardiovascular system responds to biomechanical stimuli from blood pressure, flow, and cardiac/vascular contractions.
  • Hemodynamic stimuli involve cellular signaling and interactions between blood, endothelium, and smooth muscles.
  • Abnormal biomechanical stimuli contribute to cardiovascular diseases like hypertension, vasospasm, and atherosclerosis.

Framework:

  • Discusses research on shear stress, endothelial function, blood pressure/flow regulation, myogenic tone, and mechanosensitive ion channels.
  • Summarizes findings from the 66th Annual Meeting of the Japanese Pharmacological Society.
  • Highlights the clinical implications of varying shear stress levels and hemodynamic overload.

Implementation:

  • Focuses on the physiological responses to mechanical forces within the cardiovascular system.
  • Explores the role of mechanosensitive ion channels in cardiovascular regulation.
  • Examines the link between abnormal hemodynamic stimuli and specific cardiovascular pathologies.

Implications:

  • Advances understanding of hemodynamic mechanisms in both health and disease.
  • Paves the way for novel therapeutic strategies and drug development.
  • Offers insights into managing conditions linked to altered blood flow and pressure.

Related Concept Videos

Anatomy of the Circulatory System02:03

Anatomy of the Circulatory System

The human circulatory system consists of blood, blood vessels that carry blood away from the heart, around the body, and back to the heart, and the heart itself, which acts as a central pump. The systemic circuit supplies blood to the whole body, the coronary circuit supplies blood to the heart, and the pulmonary circuit supplies blood flow between the heart and lungs.
Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
Cardiovascular Drugs: Classification based on Therapeutic Indications01:18

Cardiovascular Drugs: Classification based on Therapeutic Indications

Cardiovascular diseases, encompassing a range of conditions, can significantly affect the heart's operations and the overall circulatory system. These conditions impair the heart's ability to pump blood, leading to a deficit in oxygen supply to crucial organs. Anomalies in the heart's electrical system, known as arrhythmias, can cause heartbeats to accelerate or slow down. Usually, heart rates increase during physical activity and decrease while resting or sleeping. However, frequent irregular...
Model Approaches for Pharmacokinetic Data: Physiological Models01:15

Model Approaches for Pharmacokinetic Data: Physiological Models

Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response

Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...