Final answer:
Determining the most likely diagnosis from an ECG requires analysis of rhythm, rate, and wave patterns. Atrial fibrillation shows an irregular rhythm with an absence of distinct P waves, while atrial flutter has a characteristic 'sawtooth' pattern. Normal Sinus Rhythm demonstrates a consistent rhythm with P waves preceding each QRS complex, whereas ventricular tachycardia has broad, fast QRS complexes.
Step-by-step explanation:
The most likely diagnosis based on the given ECG options would require an analysis of the ECG patterns associated with each arrhythmia. In atrial fibrillation, we would see an irregularly irregular rhythm with no distinct P waves before each QRS complex and a variable ventricular rate. Normal Sinus Rhythm (NSR) would show a consistent rhythm with a normal rate and a P wave preceding each QRS complex. With atrial flutter, we expect to see a 'sawtooth' patterned P wave known as flutter waves. In the case of ventricular tachycardia, we would observe broad, abnormal QRS complexes occurring at a very high rate.
Without seeing the actual ECG tracing, we cannot accurately determine which arrhythmia is present. However, the ECG features described above align with the typical presentations of these arrhythmias. To confirm the diagnosis, an ECG review by a qualified healthcare professional is needed.