Where does the Ramus branch originate?

The normal pacemaker of the heart is the:

The patient arrives in the ER having an acute anterior wall MI. Which leads would indicate this?

The contrast that is best for a patient is

What is the name of this catheter?

You are circulating a LHC procedure, when suddenly this rhythm is on the monitor. After checking that the patient does not have a pulse and is not talking, what is the MOST important action should you take?

What is the catheter shown here called?

Electrostatics:

What TIMI score would be present in a patient with no reflow?

What is the coronary labeled at #5 and what projection is shown here?