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Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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The subclavian artery transitions into the axillary artery as it exits the chest and enters the axillary region. This artery is critical for supplying blood to the shoulder area, including the head of the humerus, through the humeral circumflex arteries. As the vessel continues into the upper arm or brachium, it becomes the brachial artery. This artery plays a key role in vascularizing the brachial region and bifurcates at the elbow into several branches. These branches include the deep...
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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...
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Nursing Assessment:Nursing management of acute coronary syndrome (ACS) involves taking the patient's history, focusing on primary complaints such as chest pain, dyspnea, and excessive sweating (diaphoresis), as well as other symptoms like back or jaw pain, nausea, vomiting, palpitations, dizziness, and fatigue. The nurse also reviews the patient's history of cardiac events, risk factors such as hypertension, diabetes, smoking, family history, and current medications.In the objective assessment,...
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The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
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Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome
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Subclavian steal syndrome.

Brian J Potter1, Duane S Pinto2

  • 1From the Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, MA.

Circulation
|June 4, 2014
PubMed
Summary

Subclavian steal syndrome occurs when reversed blood flow in the subclavian artery causes symptoms like arm claudication or vertebrobasilar insufficiency. Diagnosis involves imaging, and treatment options include revascularization for symptomatic patients.

Keywords:
sub clavian stealsubclavian artery stenosis

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Area of Science:

  • Vascular Surgery
  • Cardiology
  • Neurology

Background:

  • Subclavian steal syndrome results from subclavian artery occlusive disease causing reversed blood flow.
  • It is typically caused by atherosclerosis, a common cardiovascular condition.

Observation:

  • Most patients with subclavian stenosis are asymptomatic.
  • Symptomatic presentations include angina (coronary-subclavian steal), vertebrobasilar insufficiency, and arm claudication.

Findings:

  • Diagnosis is confirmed through physical examination (pulses, pressures) and advanced imaging (ultrasonography, MRA, CTA, angiography).
  • Subclavian stenosis is a significant marker for systemic atherosclerotic disease.

Implications:

  • Symptomatic individuals benefit from percutaneous or surgical revascularization.
  • Subclavian stenosis indicates an increased risk for major cardiovascular and cerebrovascular events, necessitating proactive management.