Routine electrocardiography in screening for pulmonary embolism.

Area of Science:

• Cardiology
• Pulmonary Medicine
• Diagnostic Imaging

Background:

• Pulmonary embolism (PE) is a serious condition requiring timely diagnosis.
• Electrocardiogram (ECG) analysis is a non-invasive tool used in clinical practice.
• Previous studies have suggested associations between specific ECG findings and PE.

Purpose of the Study:

• To investigate the diagnostic value of 22 specific ECG signs in patients with suspected pulmonary embolism.
• To correlate ECG findings with the presence and severity of pulmonary embolism.
• To differentiate ECG patterns between patients with and without confirmed PE.

Main Methods:

• Analysis of 22 predefined ECG signs in 245 patients with suspected pulmonary embolism.
• Classification of patients into confirmed embolism and non-confirmed embolism groups.
• Correlation of ECG sign occurrence with embolism presence, severity (lung scan), and patient recovery status.

Main Results:

• Tachycardia and S-T depression were common in both groups.
• ECG signs such as P-R displacement, late R in aVR, S1Q3T3, S slurred, and T inversion in V1-V2 were significantly more frequent in patients with PE (p < 0.05).
• S-T depression and T inversion in V1-V2 correlated with PE severity; these signs were more frequent at diagnosis than during recovery in PE patients.

Conclusions:

• Certain ECG signs are significantly associated with pulmonary embolism and its severity.
• The presence of specific ECG abnormalities, especially when new or unexplained, should raise suspicion for pulmonary embolism.
• ECG findings, in conjunction with clinical suspicion, can aid in the early diagnosis and management of pulmonary embolism.