Term
| What is the association between circulation and conduction? |
|
Definition
| Movement of blood through the heart is accomplished when the heart muscle responds to electrical stimulation, which results in contraction. |
|
|
Term
| What is the hearts inherent pacemaker? |
|
Definition
|
|
Term
| What is the Bachmann's Bundle? |
|
Definition
|
|
Term
| Atrioventricular (AV) Junction consist of? |
|
Definition
| AV node and Bundle of His |
|
|
Term
| The electrical conduction system of the heart is composed of what structures? |
|
Definition
-
SA node
-
Bachmann's Bundle
-
AV junction
-
R & L Bundle Branches
-
Purkinje Fibers
|
|
|
Term
| Conduction rate of each node? |
|
Definition
-
SA node: 60-100 beats
-
AV node: 40-60 beats
-
Purkinje Fibers: 20-40 beats
|
|
|
Term
| What is the primary function of the electrical conduction system? |
|
Definition
| to transmit electrical impulses from the SA node to the atria and ventricals causing them to contract |
|
|
Term
| 1 cardiac cycle/ 1 Heartbeat represents? |
|
Definition
|
|
Term
| the P wave on the EKG represents? |
|
Definition
contractions of the atria
or
Atrial Depolarization |
|
|
Term
| the QRS Complex on the EKG represents? |
|
Definition
contraction of the ventricles
or
Ventricular depolarization |
|
|
Term
| The PR interval represents? |
|
Definition
| The time the electrical impulse takes to travel from the SA node to the Purkinje fibers |
|
|
Term
| What is the normal range of the PR interval? |
|
Definition
|
|
Term
| The QRS complex on the EKG is? |
|
Definition
| the time interval the electrical impulse to to travel from the Purkinge fibers to contraction of the ventricles |
|
|
Term
| What is the normal range of the QRS Complex? |
|
Definition
| less than or equal to 0.12 seconds |
|
|
Term
| What are the 2 electrolytes responsible for electrical impulses of the cardiac muscle? |
|
Definition
| Sodium (Na+) and Potassium (K+) |
|
|
Term
| Which electrolyte is primarily Extracellular? |
|
Definition
|
|
Term
| Which electrolyte is primarily Intracellular? |
|
Definition
|
|
Term
|
Definition
- resting stage of teh cardiac muscle cell
- Inside of the cell is more negatively charged than the outside
|
|
|
Term
| Resting Membrane Potential |
|
Definition
| The cell becomes impermeable to NA+, Phos, Sulfate, and protein ions |
|
|
Term
|
Definition
| the inside of the cell becomes more (+) charged and the outside becomes more (-) charged, resulting in contraction. |
|
|
Term
|
Definition
| electrical relaxation of the heart |
|
|
Term
| T wave on EKG represents? |
|
Definition
Ventricular REpolarization
or
recovery/relaxation period |
|
|
Term
|
Definition
| ability to spontaneously initiate an electrical impulse |
|
|
Term
|
Definition
| ability to respond to an impulse |
|
|
Term
|
Definition
| ability to transmit an impulse to another cardiac cell |
|
|
Term
|
Definition
| ability to contract after receiving a stimulus |
|
|
Term
| parasympathetic system is also called |
|
Definition
|
|
Term
| neurotransmitter in parasympathetic NS |
|
Definition
|
|
Term
| which nerve is the primary parasympathetic nerve of the heart |
|
Definition
|
|
Term
| stimulation of the vagus nerve causes? |
|
Definition
|
- decreases their automaticity& excitability
|
|
|
