title: [Intravascular ultrasound in patients with suspected aortic dissection: comparison with transesophageal echocardiography].
abstract: Thirteen patients with suspected aortic dissection (two women, 11 men, age 61 +/- 10.8 years) underwent transesophageal echocardiography (TEE), intravascular ultrasound (IVUS), angiography, and in part computed tomography (CT). TEE was performed using 3.5 or 3.75 MHz ultrasound transducers. IVUS examination was done using a 6F 20 MHz "rotational-tip" IVUS catheter (Boston Scientific) advanced over a guiding-wire positioned in the ascending aorta by the "side-saddle" technique. In two patients it was not possible to advance the catheter into the abdominal aorta. Of the remaining 11 patients, eight had aortic dissection (six Typ III, one Typ II, and one Typ I, de Bakey classification). Two patients had aortic aneurysms without dissection and one patient had a perforation of the ascending aorta. TEE, CT, and angiography led to the correct diagnosis in all patients, while IVUS failed to provide precise information within the ascending aorta and the aortic arch. Reasons were the limited scanfield of the 20 MHz transducer and the inability to steer and position the IVUS catheter. Contrary to the limited value in the ascending aorta, IVUS could successfully scan the entire descending aorta, including the dissection membrane and the originating vessels, if the max. diameter was less than 4 cm. No adverse effects occurred. Intravascular ultrasound allows to scan the entire aorta in patients with suspected aortic dissection. The current limitations can be solved only by the introduction of steerable and/or low frequency catheters.
authors.affiliation: II. Medizinische Klinik und Poliklinik, Johannes-Gutenberg-Universität Mainz.
authors.forename: G
authors.initials: G
authors.lastname: Görge
authors.forename: R
authors.initials: R
authors.lastname: Erbel
authors.forename: T
authors.initials: T
authors.lastname: Gerber
authors.forename: J
authors.initials: J
authors.lastname: Ge
authors.forename: J
authors.initials: J
authors.lastname: Zamorano
authors.forename: T
authors.initials: T
authors.lastname: Mackowski
authors.forename: U
authors.initials: U
authors.lastname: Nixdorff
authors.forename: S
authors.initials: S
authors.lastname: Mohr-Kahaly
authors.forename: J
authors.initials: J
authors.lastname: Meyer
mesh_terms: D000368:Aged; D000784:Aortic Dissection / Q000000981:diagnostic imaging*; D001014:Aortic Aneurysm / Q000000981:diagnostic imaging*; D001019:Aortic Rupture / Q000000981:diagnostic imaging*; D001027:Aortography; D006328:Cardiac Catheterization / Q000295:instrumentation*; D004452:Echocardiography / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
vernacular_title: Intravasaler Ultraschall bei Patienten mit Verdacht auf Aortendissektion: Vergleich zur transösophagealen Echokardiographie.