Action Potentials
This is the name for phase 2
What is the plateau phase?
This ion is DIRECTLY responsible for the contraction of a cardiomyocyte.
What is Calcium?
The ion channel responsible for rapid depolarization.
What is voltage gated sodium channels?
An unequal amount of charge separated by a barrier
What is a voltage?
The structure that demonstrates decremental conduction
What is the AV node?
This ion's movement across the membrane is responsible for repolarization
What is potassium?
This acts as a storage container for the ion that causes contractions.
What is the SR (sarcoplasmic reticulum)?
The ratio of the Sodium Calcium exchanger
What is 3 sodium to 1 calcium?
The flow of ions across a barrier/membrane
Current
The junction of this structure and the right atrium is where the sinus node is located
What is the SVC?
The phase of an action potential that is correlated with conduction/propagation velocity
What is phase 0 (Depolarization)?
The phase that begins the process of calcium induced calcium release (CICR).
What is the plateau phase (2)?
The ratio and directionality of ion movements of the Na-K pump.
What is 3 Sodium out, 2 Potassium in?
Resistance to the flow of ionic current
What is impedance?
This structure is a circuit boundary for a typical atrial flutter on the lateral aspect.
What is the Crista Terminalis?
The span of time where a cell cannot be stimulated no matter what
What is the absolute (Effective) refractory period?
The structure and ion that binds in order to directly initiate the process of contraction
What is troponin and calcium?
The calcium channel with the MOST negative THRESHOLD (i.e. first threshold reached) in a pacemaker cell
What is the the T-type calcium channel?
The term used to describe UNequal propagation speeds in cardiac tissue.
What is anisotropic conduction?
Second degree AV block type I is more commonly associated with what this location of myocardial infarction
What is an inferior wall MI?
The phase and cell type responsible for maintaining heart rate.
What is phase 4 of the pacemaker cells (namely the sinus node)?
This binds and pulls on actin to cause a muscle contraction.
What are myosin heads?
This channel is unique to pacemaker cells
What is the funny current/channel?
The structure that allows for intercellular communication
What are gap junctions?
Ablation in the coronary sinus is more likely to damage this artery.
What is the Left Circumflex?