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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...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
Coronary Artery Disease III: Clinical Manifestations01:30

Coronary Artery Disease III: Clinical Manifestations

Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
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...
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...

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Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction
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慢性的な全冠動脈閉塞における微血管機能障害

G S Werner1, M Ferrari, B M Richartz

  • 1Clinic for Internal Medicine III, Friedrich-Schiller-University Jena, Erlanger Allee 101, Jena, Germany. gerald.werner@med.uni-jena.de

Circulation
|September 6, 2001
PubMed
まとめ
この要約は機械生成です。

微血管機能不全は,慢性完全冠動脈閉塞 (TCO) の患者の半数以上,特に糖尿病や高血圧の患者に影響します. 冠動脈流速準備 (CFVR) と断片流量準備 (FFR) の組み合わせは,TCO血管新生手術後の正確な評価に不可欠です.

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科学分野:

  • 心血管医学 心血管医学
  • 介入性心臓病学 介入性心臓病学
  • 冠動脈疾患 冠動脈疾患 冠動脈疾患

背景:

  • 微血管機能不全は,上心筋狭窄症なしに冠動脈フローの準備が減少した特徴です.
  • この研究では,慢性的な全冠動脈閉塞 (TCOs) のマイクロ血管機能障害の罹患率と影響を調査しました.

研究 の 目的:

  • TCOsにおけるマイクロ血管機能障害の有病率を決定する.
  • マイクロ血管機能障害と地域性心筋機能の関係を評価する.
  • TCOsにおける冠動脈流動速度準備 (CFVR) と分流準備 (FFR) の有用性を評価する.

主な方法:

  • 42人の患者でTCOのリカナライゼーションとステントを施しました.
  • 冠動脈内ドップラーで測定された冠動脈流動速度予備量 (CFVR).
  • 27人の患者のサブセットで記録された分断フローリザーブ (FFR).
  • CFVRは21人の患者で24時間後に再評価されました.

主要な成果:

  • 患者の55%がCFVRの低下を示した (<2.0).
  • サブグループでは,52%がCFVRが低下し,FFRが非有意 (>=0.75) であったが,これはマイクロ血管機能不全を示している.
  • 微血管機能不全は,糖尿病および/または高血圧の患者でより一般的であった.
  • CFVRとFFRは相関が薄かった (r=0.03).

結論:

  • 微小血管機能不全は,TCOs (55%) で,地域的な心筋機能に関係なく一般的です.
  • 糖尿病と高血圧は,マイクロ血管機能不全の増加と関連しています.
  • CFVRもFFRも単独では,TCOにおける血管新生手術の結果の評価に十分ではありません.