You are monitoring in lead II. Your patient just went into 3rd-degree heart block. They have a 4-second ventricular pause and you see regular p waves but no ventricular waves (for those 4 seconds). You are also seeing an atrial T wave. Describe what this normally hidden waveform looks like and why it looks that way.

Label the ion marked as #9

Short answer: What is the diagnosis?

Short answer: What is the initial dose of dantrolene to be given rapidly through a large-bore IV in a malignant hyperthermia case?

In a complete right vectorial shift. Which wave will be the dominant wave (largest) if monitoring lead I?

What is the total delay time of the AV node?

Assuming normal conduction and contraction: At what part in an ECG is the left ventricle the most empty?

Fill in the blank: What is the purpose of the papillary muscles and chordae tendinae?

Short answer: Describe preload and afterload in your own words.

Please label the structure numbered 46 (be specific)