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  • 1
    Digitale Medien
    Digitale Medien
    Left ventricular wall thickness measurements by magnetic resonance: a validation study (1991)
    Springer
    The international journal of cardiovascular imaging 7 (1991), S. 31-41 
    Details
    ISSN: 1573-0743
    Schlagwort(e): digital subtraction angiography ; M-mode echocardiography ; magnetic resonance imaging ; left ventricular wall thickness ; left ventricular chamber dimater
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Left ventricular (LV) wall thickness was determined by magnetic resonance (MR) in 15 patients (7 controls and 8 patients with coronary artery disease). End-diastolic (ed) and end-systolic (es) wall thickness were measured in a short axis view perpendicular to the LV long axis. Wall thickness measurements were compared to data obtained by digital subtraction angiography (DSA) and M-mode echocardiography (Echo). End-diastolic and end-systolic wall thickness were significantly overestimated by MR (34% and 37%, respectively) when compared to DSA. In contrast, LV end-diastolic and end-systolic chamber diameter were significantly underestimated by MR (25% and 30%, respectively) when compared to DSA. However, fractioned shortening was similar (all NS) for MR (48±22%), DSA (54±15%) and Echo (44±10%), respectively. The mean difference (= accuracy) and the standard deviation of difference (= precision) for LV wall thickness was 0.4±0.2 cm between MR and DSA, 0.4±0.3 cm between MR and ECHO and 0.03±0.1 cm between DSA and ECHO. The correlation of wall thickness between MR and DSA (correlation coefficient r=0.74, p〈0.001) and between MR and Echo (r=0.70, p〈0.001) was good although the standard error of estimate (SEE) was 17% for MR vs. DSA and 21% for MR vs. Echo. The corresponding SEE for chamber diameter was 16% between MR and DSA and 19% between MR and Echo, respectively. Intraobserver variability for wall thickness determination by MR was excellent (correlation coefficient r=0.99, p〈0.001) SEE of 4%. Interobserver variability was also good (correlation coefficient r=0.90, p〈0.001) with a SEE of 12%. It is concluded that LV wall thickness and chamber diameter (short axis plane) can be determined by MR with good precision but only satisfactory accuracy. LV wall thickness is significantly overestimated probably due to signals from static blood which might be indistinguishable from the subendocardium.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01797678
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Die Korrekturarthrodese bei isolierten posttraumatischen Fehlstellungen im Subtalargelenk (1998)
    Springer
    Der Chirurg 69 (1998), S. 866-871 
    Details
    ISSN: 1433-0385
    Schlagwort(e): Key words: Fractures of os calcis ; Posttraumatic deformation of hindfoot ; Reconstructive surgery. ; Schlüsselwörter: Fußfrakturen ; Subtalargelenk ; posttraumatische Fehlstellung ; rekonstruktive Chirurgie.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung. Zwischen 1990 und 1995 wurden wegen posttraumatischer Fehlstellungen 27 Korrekturarthrodesen des subtalaren Gelenks durchgeführt. Präoperativ litten 24 Patienten (88,89 %) unter mäßigen bis starken Schmerzen, 15 (55,56 %) hatten eine Gehstrecke bis 100 m, 7 (25,92 %) waren deswegen vollberentet (berufsunfähig). Die Kontrolle durchschnittlich 14 (13,85) Monate postoperativ zeigte eine signifikante Schmerzreduktion. Achtzehn Patienten (66,67 %) hatten keine oder nur leichte Schmerzen, die Gehstrecke war bei 19 Patienten (70,37 %) frei. In Anlehnung an die von Angus und Skuginna erstellten Bewertungskriterien nach Korrektureingriffen am Fuß wurde bei 81,48 % der Patienten ein gutes bis befriedigendes Ergebnis erzielt. Entsprechend der von Kitaoka et al. erstellten Kriterien lag die durchschnittlich postoperativ erreichte Punktzahl bei 75,8.
    Notizen: Summary. Between 1990 and 1995, 27 patients with posttraumatic disorders of the subtalar joint were treated by correcting fusion. Preoperatively 24 patients (88.89 %) suffered from pain; 15 (55.56 %) had a walking range below 100 m. Seven patients were unable to work in their original profession. After an average period of 13.85 months postoperatively the patients were examined again. At this time 18 (66.67 %) had no or minimal pain; 19 (70.37 %) had no claudication. According to the score of Angus and Skuginna, in 81.48 % of patients the result of the correcting arthrodesis was successful; according to Kitaoka's clinical rating system for ankle-hindfoot, midfoot, hallux and lesser toes, the average postoperative score was 75.8 points.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001040050503
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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