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Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

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...

Peripheral Artery Disease III: Interprofessional Care

Peripheral Artery Disease III: Interprofessional Care

Peripheral Artery Disease (PAD) is characterized by narrowed arteries that diminish blood flow to the extremities. Effective management of PAD requires an interprofessional approach involving various healthcare professionals. The critical aspects of interprofessional care for PAD patients focus on risk factor modification, drug therapy, exercise therapy, nutrition therapy, critical limb ischemia care, and interventional radiology and surgical procedures.The primary treatment goal for PAD...

Peripheral Artery Disease I: Introduction

Peripheral Artery Disease I: Introduction

Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...

Vascular Spasm

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...

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Related Experiment Video

Updated: Jun 4, 2026

Controlled Reversible Visceral Arterial Ischemia, Venous Congestion and Combined Malperfusion via Midline Laparotomy in Rats

Controlled Reversible Visceral Arterial Ischemia, Venous Congestion and Combined Malperfusion via Midline Laparotomy in Rats

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Segmental arterial mediolysis.

Christine P Chao¹

¹Department of Radiology, Kaiser Permanente, San Rafael, California.

Seminars in Interventional Radiology

|February 18, 2011

Summary

Segmental arterial mediolysis (SAM) is a rare arteriopathy causing dissecting aneurysms. Prompt diagnosis is vital, as SAM can be fatal or require urgent intervention.

Area of Science:

Vascular Medicine
Radiology
Pathology

Background:

Segmental arterial mediolysis (SAM) is a nonatherosclerotic arteriopathy.
It involves lysis of the outer arterial media, leading to dissecting aneurysms.
Commonly presents as abdominal pain and hemorrhage in the elderly.

Purpose of the Study:

To highlight the key diagnostic features of SAM.
To differentiate SAM from vasculitis.
To emphasize the importance of prompt diagnosis for management.

Main Methods:

Review of imaging findings (CT and angiography).
Comparison of SAM characteristics with vasculitides.
Analysis of clinical presentations and outcomes.

Keywords:

Segmental arterial mediolysis imaging findings

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Main Results:

SAM imaging findings overlap with vasculitides but show characteristic dissections.
Differentiating SAM from inflammatory arteritis is crucial for treatment.
Acute SAM has a high mortality rate (50%) without prompt intervention.

Conclusions:

SAM is a distinct arteriopathy characterized by arterial dissections.
Accurate diagnosis is critical to avoid ineffective or harmful treatments like immunosuppressants.
Timely recognition and management, potentially including surgery or endovascular therapy, are essential for improving outcomes in SAM.