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Long-term prognostic value of major and minor ECG abnormalities in latent Keshan disease with suspect chronic Keshan disease.

Zhu Y, Lai B, Niu X, Wei J, Tan W, Wang X - J Epidemiol (2014)

Bottom Line: Four hundred and fourteen new latent KD patients from a monitored population in China were diagnosed and then followed for 10 years.After adjustment for baseline potential confounders, the hazard ratios and 95% confidence intervals (CIs) for progression to chronic KD in latent KD patients with major ECG abnormalities versus those with minor ECG abnormalities was 2.43 (95% CI 1.58-3.93).Major ECG abnormalities and new ventricular premature complex abnormalities that occurred during the follow-up were both associated with an increased risk of progression to chronic KD.

View Article: PubMed Central - PubMed

Affiliation: Institute of Endemic Disease, Key Laboratory of Environment and Gene Related to Diseases of Ministry Education, School of Medicine, Xi'an Jiaotong University.

ABSTRACT

Objective: This study aims to determine whether baseline electrocardiography (ECG) abnormalities, the appearance of new ECG abnormalities, or other clinical characteristics are associated with increased rates of progression to chronic Keshan disease (KD) among patients with latent KD.

Methods: Four hundred and fourteen new latent KD patients from a monitored population in China were diagnosed and then followed for 10 years. Baseline and 10-year ECG abnormalities were classified according to the Minnesota Code as major and minor. Using Cox proportional hazards regression models, the addition of ECG abnormalities to traditional risk factors were examined to predict chronic KD events.

Results: In 414 latent KD patients with ECG abnormalities, 220 (53.1%) had minor and 194 (46.9%) had major ECG abnormalities. During the follow-up, 92 (22.2%) patients experienced chronic KD events; 32 (14.5%) and 60 (30.9%) of these chronic KD events occurred in the minor and major ECG abnormalities groups, respectively. After adjustment for baseline potential confounders, the hazard ratios and 95% confidence intervals (CIs) for progression to chronic KD in latent KD patients with major ECG abnormalities versus those with minor ECG abnormalities was 2.43 (95% CI 1.58-3.93).

Conclusions: Major ECG abnormalities and new ventricular premature complex abnormalities that occurred during the follow-up were both associated with an increased risk of progression to chronic KD. Atrial fibrillation and right bundle branch block with left anterior hemiblock are the most strongly predictive components of major ECG abnormalities. Depending on the model, adding ECG abnormalities to traditional risk factors was associated with improved risk prediction in latent KD.

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Kaplan-Meier estimates of chronic KD cumulative hazard over time of major vs minor ECG abnormalities.
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fig02: Kaplan-Meier estimates of chronic KD cumulative hazard over time of major vs minor ECG abnormalities.

Mentions: The Kaplan-Meier estimates of chronic KD cumulative hazard over time for latent KD cases with minor ECG abnormalities versus major ECG abnormalities were calculated, and the results are shown in Figure 2, which shows a significant difference in chronic KD outcomes (log-rank P < 0.01) between the two groups. Major ECG abnormalities at baseline were associated with an increased risk of chronic KD.


Long-term prognostic value of major and minor ECG abnormalities in latent Keshan disease with suspect chronic Keshan disease.

Zhu Y, Lai B, Niu X, Wei J, Tan W, Wang X - J Epidemiol (2014)

Kaplan-Meier estimates of chronic KD cumulative hazard over time of major vs minor ECG abnormalities.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150009&req=5

fig02: Kaplan-Meier estimates of chronic KD cumulative hazard over time of major vs minor ECG abnormalities.
Mentions: The Kaplan-Meier estimates of chronic KD cumulative hazard over time for latent KD cases with minor ECG abnormalities versus major ECG abnormalities were calculated, and the results are shown in Figure 2, which shows a significant difference in chronic KD outcomes (log-rank P < 0.01) between the two groups. Major ECG abnormalities at baseline were associated with an increased risk of chronic KD.

Bottom Line: Four hundred and fourteen new latent KD patients from a monitored population in China were diagnosed and then followed for 10 years.After adjustment for baseline potential confounders, the hazard ratios and 95% confidence intervals (CIs) for progression to chronic KD in latent KD patients with major ECG abnormalities versus those with minor ECG abnormalities was 2.43 (95% CI 1.58-3.93).Major ECG abnormalities and new ventricular premature complex abnormalities that occurred during the follow-up were both associated with an increased risk of progression to chronic KD.

View Article: PubMed Central - PubMed

Affiliation: Institute of Endemic Disease, Key Laboratory of Environment and Gene Related to Diseases of Ministry Education, School of Medicine, Xi'an Jiaotong University.

ABSTRACT

Objective: This study aims to determine whether baseline electrocardiography (ECG) abnormalities, the appearance of new ECG abnormalities, or other clinical characteristics are associated with increased rates of progression to chronic Keshan disease (KD) among patients with latent KD.

Methods: Four hundred and fourteen new latent KD patients from a monitored population in China were diagnosed and then followed for 10 years. Baseline and 10-year ECG abnormalities were classified according to the Minnesota Code as major and minor. Using Cox proportional hazards regression models, the addition of ECG abnormalities to traditional risk factors were examined to predict chronic KD events.

Results: In 414 latent KD patients with ECG abnormalities, 220 (53.1%) had minor and 194 (46.9%) had major ECG abnormalities. During the follow-up, 92 (22.2%) patients experienced chronic KD events; 32 (14.5%) and 60 (30.9%) of these chronic KD events occurred in the minor and major ECG abnormalities groups, respectively. After adjustment for baseline potential confounders, the hazard ratios and 95% confidence intervals (CIs) for progression to chronic KD in latent KD patients with major ECG abnormalities versus those with minor ECG abnormalities was 2.43 (95% CI 1.58-3.93).

Conclusions: Major ECG abnormalities and new ventricular premature complex abnormalities that occurred during the follow-up were both associated with an increased risk of progression to chronic KD. Atrial fibrillation and right bundle branch block with left anterior hemiblock are the most strongly predictive components of major ECG abnormalities. Depending on the model, adding ECG abnormalities to traditional risk factors was associated with improved risk prediction in latent KD.

Show MeSH
Related in: MedlinePlus