Zusammenfassung
Tissue Doppler Imaging ist eine neue Ultraschalltechnik, die die Aufzeichnung und
Analyse von myokardialen Velocity- und Deforming-Parametern im menschlichen Herz erlaubt.
In der Kardiologie wird diese innovative Technik zur Erkennung ischämischer Regionen,
„gelähmter” Areale nach Herzinfarkt und zur Diagnostik von Dyssynchronien verwandt.
In den letzten zwei Jahren hat unsere Arbeitsgruppe diese Technologie eingehend am
fetalen Herzen getestet. Es ist eindeutig möglich, einen fetalen Herzzyklus aufgrund
der typischen myokardialen Velocity-Kurven zu bestimmen. Die Kurvenqualität entspricht
Ergebnissen aus der Erwachsenen-Kardiologie. Es ergeben sich viele innovative Analysemöglichkeiten
wie z. B. der Vergleich der Kinetik verschiedener myokardialer Segmente in einem Herzzyklus,
die Bestimmung der prä- und postsystolischen Herzzeitintervalle (isovolämische Kontraktionszeit,
isovolämische Relaxationszeit), die Beurteilung der diastolischen Funktion aufgrund
der Analyse der Em - und Am -Wellen und die Detektion der atrialen Kontraktion. Diese Parameter werden derzeit
in der Kardiologie zur erweiterten Herzfunktionsanalyse benutzt. TDI ist ein erster
Schritt hin zum Parametric Imaging des fetalen Herzens und markiert damit den Beginn
einer neuen Ära in der fetalen Echokardiografie.
Abstract
Tissue Doppler imaging is a new ultrasound technique for the acquisition and analysis
of myocardial velocity and deforming parameters in the human heart. In cardiology
this innovative technique is used to identify ischemic regions and stunned areas after
cardiac infarction and to diagnose dyssynchrony. In the last two years, our research
group has been using this technique extensively on fetal hearts. It is possible to
establish the fetal cardiac cycle clearly just by analyzing the typical courses of
myocardial velocity curves. The quality of the curves is comparable to the results
in adult cardiology. Consequently, many innovative analysis options can be acquired,
e. g., the comparison of the kinetics of several myocardial regions in the cardiac
cycle, the determination of pre- and post-systolic intervals (isovolumic contraction
time, isovolumic relaxation time), the evaluation of diastolic function by analyzing
the Em and Am waves and the detection of the atrial contraction. These parameters are currently
used in cardiology for extended function analysis. Tissue Doppler imaging is the first
step in parametric imaging of the fetal heart and consequently marks the beginning
of a new era in fetal echocardiography.
Key words
cardiac - echocardiography - ultrasound - fetus - Doppler ultrasound
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1 (both authors contributed equally to the manuscript)
Dr. Johannes Steinhard
Obstetrics and Gynecology, University of Münster, Prenatal Medicine Unit
Albert-Schweitzer-Str. 33
48129 Münster
Phone: ++ 49/2 51/8 34 82 03
Fax: ++ 49/2 51/8 34 82 10
Email: steinjo@uni-muenster.de