Final answer:
In general, a high percentage of patients with ventricular tachycardia may become unresponsive immediately and require intervention.
Step-by-step explanation:
The percentage of patients with ventricular tachycardia who become unresponsive immediately and require intervention can vary depending on the individual case and the severity of the condition. However, in general, a high percentage of patients with ventricular tachycardia may become unresponsive immediately and require intervention. So the correct answer would be option 3) 75%.