The ECG Tracings in Figure 8-18 Are Very Short Vertical

question 24

Multiple Choice

The ECG tracings in Figure 8-18 are very short vertical straight lines which can be as small as 2 ms. What do these tracings represent?
 

• A) Loss of capture
• B) Dual chamber pacing
• C) Atrial paced rhythm
• D) Pacemaker spikes

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Definitions:

Double Bond

A chemical bond in which two pairs of electrons are shared between two atoms.

Lewis Structure

A representation of molecules where symbols for elements are used to represent nuclei and inner-shell electrons, and dots or dashes between symbols represent electron pairs forming covalent bonds.

Ammonia

A colorless gas with a distinct sharp smell, composed of nitrogen and hydrogen (NH3), used as a fertilizer, in cleaning products, and in the synthesis of various chemicals.

Lewis Structure

A representation of molecules showing all the atoms, valence electrons, and bonding between atoms as well as any lone pairs of electrons.