[Cardiovascular abnormalities in Bavaria 1984-1991]

Area of Science:

• Pediatric Cardiology
• Developmental Biology
• Epidemiology

Background:

• Congenital heart defects (CHDs) are a significant cause of infant mortality.
• Understanding the prevalence and patterns of CHDs is crucial for public health initiatives.
• Previous studies have provided general data, but regional variations require specific investigation.

Purpose of the Study:

• To determine the birth prevalence and characteristics of structural congenital heart disease in Bavarian livebirths.
• To analyze the association of CHDs with chromosomal abnormalities, syndromes, and other malformations.
• To establish regional epidemiological data for Germany and compare findings with international studies.

Main Methods:

• Retrospective review of hospital records for livebirths in Bavaria between 1984 and 1991.
• Ascertainment of cases up to two years of age.
• Classification of cardiovascular malformations based on developmental mechanisms.

Main Results:

• Identified 7020 cases of structural CHD among 984,570 livebirths, with a birth prevalence of 7.1 per 1000 livebirths.
• Observed an increase in total prevalence from 5.9/1000 to 8.0/1000 between 1984 and 1991.
• Found that 78.1% of CHDs were isolated, while 21.9% were associated with other abnormalities; the overall fatality rate was 12.0%.

Conclusions:

• This study provides the first regional data on CHD birth prevalence in Germany.
• The classification scheme aids in categorizing CHD phenotypes into pathogenetic groups, potentially related to common causal factors.
• Findings underscore the importance of continued surveillance and research into the etiology and management of congenital heart defects.