Coronary Angiography Clinical Trial
Abdominal aortic aneurysms (AAA) are localized, blood-filled dilations (balloon-like bulges)
of the aorta. Approximately 90% of abdominal aortic aneurysms occur infrarenally (1). It is
most commonly asymptomatic and can be detected randomly during screening. Its prevalence
rate in men aged 65 years and more is 5 - 8% (3).
The risk factors for the occurrence of AAA are male gender, advanced age, history of
atherosclerosis, cigarette smoking and 1st degree family history (4).
The prevalence rate is higher in patients with history of atherosclerosis of peripheral
blood vessels and coronary arteries (5 - 7). As the size of an aneurysm increases, there is
an increased risk of rupture, which can result in severe hemorrhage and death. The death
rate due to rupture in the elderly population is 90% (3, 8). Elective surgical repair of the
abdominal aortic aneurysm is associated with a death rate of 8% (9). Therefore, the
importance of the screening of populations at elevated risk is obvious (5 - 7, 10 -14).
Among imaging techniques, ultrasonographic screening for abdominal aortic aneurysm is
technically simple, accurate and devoid of ionizing radiation. Ultrasonographic diagnosis of
AAA is associated with a major reduction in the incidence of abdominal aortic
aneurysm-related mortality (15 - 19). The sensitivity of ultrasonographic screening for
abdominal aortic aneurysm is about 100% (19). The most common clinical indications for
ultrasonographic screening for abdominal aortic aneurysm are a palpable abdominal mass,
hemodynamic impairment of aortic system in lower extremities, pain in the chest, lower back
or scrotum, and abdominal bruits.
Ultrasonography is used to screen for aneurysms when the outer aortic diameter is more than
3 cm (normal diameter of the aorta is around 2 cm (20). There is disagreement regarding the
follow-up of patients after detection of abdominal aortic aneurysm in diameter of 2.6 cm -
2.9 cm (22). Random detection of abdominal aortic aneurysm where the aortic diameter is 2.6
cm, in men aged 65 years and more, have been associated with no risk for its future
significant development (21). Ultrasonographic evaluation of abdominal aorta is a challenge
for clinicians because of the need for the accurate detection of aortic diameter (20).
n/a
Intervention Model: Single Group Assignment, Primary Purpose: Diagnostic
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