What is the clinical evidence from this study?

Study design: Systematic Review. Population: Congenital heart disease (CHD). Intervention: Congenital heart disease. Primary outcome: Incidence of congenital heart disease per 1,000 live births.

What question did this study set out to answer?

To identify the reasons for variability in reported congenital heart disease (CHD) incidence, estimate its true frequency, and characterize rates of specific major cardiac lesions.

April 21, 2026Journal of the American College of Cardiology

The incidence of congenital heart disease

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Key result

Moderate and severe congenital heart disease affects ~6 per 1,000 live births, rising tenfold with trivial lesions.

Why the study?

The incidence of congenital heart disease varies widely across studies, and the reasons for this variability and the true incidence remain unclear.

Population

62 studies published after 1955 reporting incidence of CHD in live births

Design

Review of incidence studies with focus on diagnostic methods including echocardiography

Authors

JHJulien I.E. HoffmanPediatric / Congenital Cardiology SKSamuel KaplanRhode Island Hospital

Discussion

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Implication

Informs consistent CHD incidence estimates for counseling and resource planning; confirms reported variability reflects trivial lesion detection, not geography or time.

Key Points

To identify the reasons for variability in reported congenital heart disease (CHD) incidence, estimate its true frequency, and characterize rates of specific major cardiac lesions.
Reviewed CHD incidence data reported across 62 studies published after 1955, analyzing the diagnostic role of neonatal echocardiography.
Calculated incidence rates for specific major CHD subtypes using data extracted from 44 studies stratified by lesion severity.
Reported overall CHD incidence varied widely from ~4/1,000 to 50/1,000 live births, driven predominantly by early echocardiographic detection of small ventricular septal defects (VSDs) and trivial lesions.
Moderate and severe forms of CHD occurred at approximately 6/1,000 live births (19/1,000 if bicuspid aortic valve is included), whereas total CHD reached 75/1,000 live births when including tiny muscular VSDs and other trivial lesions.
After accounting for diagnostic methodology and the inclusion of minor defects, true CHD incidence showed no differences across geographic regions or historical periods.

Study Design

Type

Systematic Review

Structured PICO

Population

A review of 62 studies published after 1955 to determine the true incidence and causes of variability in reported rates of congenital heart disease among live births.

Outcome

Incidence of congenital heart disease (overall and specific major forms)

The apparent variability in CHD incidence across studies is primarily driven by the inclusion of trivial lesions such as small VSDs, with the true incidence of moderate to severe CHD being approximately 6 per 1,000 live births.

Cite This Study

Hoffman et al. (2002) conducted a systematic review in Congenital heart disease (CHD). Congenital heart disease was evaluated on Incidence of congenital heart disease per 1,000 live births. The incidence of moderate and severe congenital heart disease is about 6/1,000 live births, increasing to 75/1,000 when trivial lesions like tiny muscular VSDs are included.

synapsesocial.com/papers/69e740fc29aee836d6f4d2e9 https://doi.org/10.1016/s0735-1097(02)01886-7

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Implication

Informs consistent CHD incidence estimates for counseling and resource planning; confirms reported variability reflects trivial lesion detection, not geography or time.

The incidence of congenital heart disease

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

The incidence of congenital heart disease

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

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