Related Experiment Video

Updated: Jun 9, 2025

Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders
06:39

Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders

Published on: August 18, 2016

15.7K

The Need for Separate Testing with Acetylcholine for the Assessment of Endothelial Dysfunction and Coronary Artery

Shozo Sueda1, Tomoki Sakaue2

  • 1Department of Cardiology, Ehime Niihama Prefectural Hospital Niihama, Japan.

European Cardiology
|October 25, 2024
PubMed

Insights

Intracoronary acetylcholine (ACH) testing diagnoses coronary vasomotor disorders. Differences in ACH testing methods between Western and Japanese protocols may explain the varying prevalence of coronary endothelial dysfunction and spasm observed in these populations.

Area of Science:

  • Cardiology
  • Clinical Diagnostics

Background:

  • Intracoronary acetylcholine (ACH) testing is crucial for diagnosing coronary vasomotor disorders, including endothelial dysfunction and epicardial/microvascular spasm.
  • Significant methodological differences exist in ACH testing protocols between Western and Japanese practices.
  • These protocol variations may influence the observed prevalence of different types of coronary vasomotor disorders.

Purpose of the Study:

  • To discuss the optimal method for diagnosing endothelial dysfunction and epicardial/microvascular spasm using intracoronary ACH testing.
  • To compare Western and Japanese intracoronary ACH testing protocols and their potential impact on diagnostic outcomes.

Main Methods:

  • Continuous intracoronary ACH injection (2-3 minutes, no pacemaker) is common in Western countries.
  • Rapid intracoronary ACH injection (20-30 seconds, with pacemaker) is traditional in Japan.
  • Comparison of diagnostic findings based on these differing methodologies.

Main Results:

  • Coronary microvascular spasm is more frequently observed in Western populations.
  • Coronary epicardial spasm is more frequently observed in Japanese subjects.
  • Methodological differences in ACH testing may contribute to these contrasting prevalence rates.

Conclusions:

  • The specific protocol used for intracoronary ACH testing can influence the diagnosis of coronary vasomotor disorders.
  • Understanding these methodological differences is essential for accurate diagnosis and comparison of findings across different geographical regions.
  • Further research may be needed to establish a universally optimal protocol for ACH testing.

Keywords:
Vasoreactivity testingacetylcholinecoronary endothelial dysfunctioncoronary microvascular spasmepicardial spasm

More Related Videos

Testing Acetylcholine Followed by Adenosine for Invasive Diagnosis of Coronary Vasomotor Disorders05:58

Testing Acetylcholine Followed by Adenosine for Invasive Diagnosis of Coronary Vasomotor Disorders

Published on: February 3, 2021

3.4K
Acetylcholine Re-Challenge After Intracoronary Nitroglycerine Administration07:59

Acetylcholine Re-Challenge After Intracoronary Nitroglycerine Administration

Published on: April 4, 2022

1.2K

Related Concept Videos

Acute Coronary Syndrome III: Diagnostic studies01:30

Acute Coronary Syndrome III: Diagnostic studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
3
Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
673
Atherosclerosis II: Clinical manifestations and prevention01:27

Atherosclerosis II: Clinical manifestations and prevention

Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
1
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
2