Ultrasound-Guided Pacing

In 2005 the American Heart Association removed pacing asystole from the cardiac arrest algorithm. This action was a result of multiple studies (1,2) showing no benefit. These studies are full of limitations such as:
Mechanical capture not recorded or confirmed
Significant delays in initiation
Including all-comer asystolic patients
The difference between pacing bradycardia versus asystole becomes blurrier as the heart rate decreases. For example, consider these three scenarios:
You have a patient with a heart rate of 40, blood pressure 70/39, and unresponsive. Are you ok with pacing?
You have a patient with a heart rate of 30, blood pressure 68/34, and unresponsive. Are you ok with pacing?