This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Karnik, R. Articles by Slany, J. Search for Related Content PubMed PubMed Citation Articles by Karnik, R. Articles by Slany, J. Social Bookmarking                         What's this?

Transcranial Doppler Monitoring During Percutaneous Transluminal Aortic Valvuloplasty

Second Medical Department, Krankenanstalt Rudolfstiftung, Vienna, Austria

Andreas Valentin

Second Medical Department, Krankenanstalt Rudolfstiftung, Vienna, Austria

Gerhard Bonner

Second Medical Department, Krankenanstalt Rudolfstiftung, Vienna, Austria

Bert Ziegler

Second Medical Department, Krankenanstalt Rudolfstiftung, Vienna, Austria

Jörg Slany

Second Medical Department, Krankenanstalt Rudolfstiftung, Vienna, Austria

Cerebral blood flow was studied in 12 elderly patients with severe calcific aortic stenosis by means of transcranial Doppler sonography (TCD) during percutaneous transluminal aortic valvuloplasty (PTAV).

In 8 of these 12 patients duplex sonography revealed a stenosis of the internal carotid artery (ICA) exceeding 50%. Frequency spectra of 10 patients showed a satisfactory quality and were analyzed. In 7 subjects balloon inflation was well tolerated and systolic blood pressure did not drop below 75 mmHg. In these patients, whether they had a stenosis of the ICA or not, blood flow velocity in the middle cerebral artery (MCA) did not decrease to a critical level. The authors defined "critical" as a reduction of mean blood flow velocity in the MCA exceeding 50% or a decrease below 35 cm/sec. Three patients showed a rapid decrease of systolic aortic pressure below 75 mmHg. In these subjects mean blood flow velocity in the MCA dropped to levels below 35 cm/sec. Deflation and retraction of the balloon resulted in a rapid increase of systemic blood pressure and flow velocity in the MCA. This report demonstrates TCD to be a useful monitoring method of determining residual perfusion in patients with aortic stenosis during PTAV.

Angiology, Vol. 41, No. 2, 106-111 (1990)
DOI: 10.1177/000331979004100203


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?