Yes, peripheral vascular disease (PVD) is primarily an arterial condition.
Peripheral vascular disease (PVD) refers predominantly to atherosclerotic disease affecting the arteries, though the term can technically encompass both arterial and venous pathology. The preferred and more precise clinical terminology is "peripheral artery disease" (PAD), which specifically denotes stenotic, occlusive, and aneurysmal diseases of the aorta and its branch arteries, exclusive of the coronary arteries 1, 2.
Key Definitions and Terminology
The ACC/AHA guidelines explicitly clarify that the term "peripheral arterial disease" includes disorders that lead to progressive stenosis, occlusion, or aneurysmal dilation of the aorta and its noncoronary branch arteries, including the carotid, upper extremity, visceral, and lower extremity arterial branches 1. For clinical purposes, PAD specifically refers to atherosclerotic stenosis or occlusion of the aorta and arteries supplying the lower extremities, as well as abdominal aortic aneurysms 1.
Pathophysiology and Etiology
The major cause of lower extremity PAD is atherosclerosis 3. Risk factors that increase the likelihood of developing PAD include:
- Cigarette smoking
- Diabetes mellitus
- Dyslipidemia
- Hypertension
- Hyperhomocysteinemia
While atherosclerosis is the predominant cause, PAD can have other etiologies beyond atherosclerosis, including 3:
- Thromboembolic disease
- Inflammatory conditions (arteritides)
- Aneurysmal disease (hereditary or acquired)
- Trauma
- Adventitial cysts or entrapment syndromes
- Congenital abnormalities
- Fibromuscular dysplasia (particularly in renal arteries)
Clinical Distinction: Arterial vs. Venous Disease
It is critical to distinguish that while the generalized term "peripheral vascular disease" may technically refer to vascular disorders in any non-coronary bed (including venous disease), the specific term "peripheral arterial disease" refers exclusively to atherosclerotic disease of the arteries 4. Peripheral disease can affect arteries, veins, and lymphatic circulations, but when clinicians use "PVD" in practice, they are typically referring to arterial pathology 5.
Clinical Implications
The arterial nature of PAD has profound clinical significance. Patients with PAD face markedly increased rates of myocardial infarction, stroke, and cardiovascular death due to the systemic nature of atherosclerosis 3, 2. The prognosis is characterized by increased risk for cardiovascular ischemic events due to concomitant coronary artery disease and cerebrovascular disease, with these cardiovascular events being more frequent than ischemic limb events 3.
Common Pitfall to Avoid
Do not confuse PAD with venous insufficiency or deep vein thrombosis. While both affect the peripheral vasculature, they are distinct pathophysiologic processes requiring different diagnostic approaches and treatments. PAD is an arterial condition manifesting with claudication, rest pain, or tissue loss, whereas venous disease presents with edema, varicose veins, and venous stasis changes.