Examine the attached ECG image and identify the type of arrhythmia present.
The ECG shows a series of wide QRS complexes occurring at a rapid rate.

Choice A rationale

Ibuprofen is not indicated for chest pain that may suggest myocardial infarction (MI). NSAIDs like ibuprofen can increase cardiovascular risk, thus inappropriate for suspected cardiac events. Administering ibuprofen could mask symptoms.

Choice B rationale

Enteric-coated acetaminophen is not suitable for acute chest pain related to suspected MI. It offers pain relief but does not address underlying ischemic heart disease. Immediate cardiac evaluation and intervention are required in such cases.

Choice C rationale

While maintaining oxygen saturation is essential, it does not address the need for immediate cardiac evaluation in suspected MI. Adequate oxygenation supports tissue perfusion, but it is not the definitive diagnostic or therapeutic intervention.

Choice D rationale

Obtaining an EKG is crucial for diagnosing myocardial infarction by assessing electrical activity of the heart. It helps identify ischemia or infarction. Early detection of abnormalities ensures prompt treatment and reduces complications.

Choice A rationale

A QRS duration of 0.30 seconds is abnormally long. The normal QRS duration is 0.06 to 0.12 seconds, indicating this is not normal sinus rhythm.

Choice B rationale

An inverted T wave is not a characteristic of normal sinus rhythm. It may indicate ischemia or other cardiac abnormalities.

Choice C rationale

A P-R interval of 0.32 seconds is prolonged. The normal P-R interval is 0.12 to 0.20 seconds, thus indicating an abnormal rhythm.

Choice D rationale

The P wave falling before the QRS complex is a key characteristic of normal sinus rhythm, representing the orderly conduction of electrical impulses from atria to ventricles. .