Final answer:
Abnormalities such as second-degree or partial block, atrial fibrillation, ventricular tachycardia, ventricular fibrillation, and third-degree block may be missing from the ECG pattern.
Step-by-step explanation:
While interpreting an ECG pattern is complex and requires training and experience, there are certain abnormalities that can be detected. These include second-degree or partial block, atrial fibrillation, ventricular tachycardia, ventricular fibrillation, and third-degree block. These abnormalities can be identified by observing irregularities in the P wave, QRS complex, and T wave of the ECG pattern.