Time course of the effects of temocapril on cardiovascular structure and function in patients with essential

M Takata1, H Ueno, T Hirai

  • 1The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University, Japan.

Insights

Angiotensin-converting enzyme (ACE) inhibition with temocapril gradually reversed structural changes in hypertensive patients' left ventricles and arterioles over 12 months. However, large artery stiffness remained unaffected by this ACE inhibition therapy.

Area of Science:

  • Cardiology
  • Pharmacology
  • Hypertension Research

Background:

  • Essential hypertension is associated with cardiovascular structural changes.
  • Angiotensin-converting enzyme (ACE) inhibitors are a common treatment for hypertension.
  • Understanding the time course of structural changes during ACE inhibition is crucial.

Purpose of the Study:

  • To investigate the time course of cardiovascular structural changes in essential hypertension patients treated with an ACE inhibitor.
  • To assess the impact of temocapril on left ventricular structure, forearm vascular resistance, and carotid artery stiffness.

Main Methods:

  • A 12-month study involving 15 essential hypertensive subjects.
  • Measurements included left ventricular structure, forearm minimal vascular resistance, and carotid artery stiffness beta.
  • Temocapril treatment was administered, with assessments during a placebo period and at 2, 6, and 12 months.

Main Results:

  • Blood pressure decreased within 2 weeks and remained controlled for 12 months.
  • Left ventricular mass index significantly decreased after 2 months and normalized by 12 months.
  • Forearm minimal vascular resistance gradually decreased over 12 months.
  • Carotid artery stiffness beta showed no significant alteration during the 1-year treatment period.

Conclusions:

  • Temocapril treatment led to gradual regression of left ventricular and arteriolar structural changes in hypertensive patients.
  • Large artery structure, as indicated by carotid artery stiffness, was not affected by 1-year ACE inhibition.
  • ACE inhibition demonstrates progressive reversal of specific cardiovascular structural abnormalities in hypertension.

Related Concept Videos

Time Course of Drug Effect01:14

Time Course of Drug Effect

The progression of a drug's impact can be analyzed by examining both the concentration-time course and the effect-time course. The concentration-time course is determined by the drug's half-life and is influenced by factors such as its pharmacokinetics, including absorption, distribution, metabolism, and elimination. The effect of the drug is often related to its concentration in the plasma and is calculated using the maximum drug effect and the plasma concentration that generates 50 percent of...
Antihypertensive Drugs: Action of β1 Blockers01:17

Antihypertensive Drugs: Action of β1 Blockers

β1-receptors are primarily located in the heart and kidneys. In cardiac myocytes, these receptors interact with neurotransmitters released by the sympathetic nervous system during heightened activity or danger. As a result, β1-receptors get activated, initiating a series of biochemical processes. Excessive activation of beta receptors due to chronic stress can abnormally increase heart rate and contractility, resulting in high blood pressure or hypertension. To counteract this, β1-blockers...
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
Antihypertensive Drugs: Vasodilators01:23

Antihypertensive Drugs: Vasodilators

Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...