Cardiac Foundations Flashcards
What is the purpose of the fibrous skeleton?
Separates electrical signals between the atria and ventricles and provides structure for the heart and valves
Name the cardiac muscle layers in order from outside to inside.
Epicardium, Myocardium, endocardium
Name the pericardial fibrous sac layers from outside to inside.
Parietal cavity, Pericardial cavity, Visceral pericardium
The later of the pericardiac sack adhering to the wall of the epicardium.
Visceral Pericardium
The part of the pericardial fibrous sac that is fluid filled?
Pericardial cavity
The layer of the pericardial fibrous sac that adheres to the diaphragm?
Partietal cavity
The artery that supplies blood to the SA node, the bottom, the back , and the right side of the heart
Right coronary artery (RCA)
The artery that supplies blood to the front and left side of the heart
Left main coronary artery
Removes Co2 and waste products from the heart muscle
Coronary veins
Pacemaker of the heart
SA node
Has a bpm of 60-100bpm
SA node
What slows down the conduction from the SA node to allow proper ventricular filling time?
AV node
Has a bpm of 40-60 bpm
AV node
final pacemaker of the heart
His Bundle
Has a bpm of 20-40 bpm
His bundle
Separates the atrial tissue from the trabeculated segments of the RA
crista terminalis
Band of tissue that surrounds the fossa ovalis
Limbic ridge
More prominent the bigger challenge to target the fossa ovals for transeptal access/ puncture
Limbic ridge
Semi- circular fold as the coronary sinus enters the RA
Thebesian valve
The more prominent the tissue the more of a challenge it is to advance the catheter
Thebesian Valve
Fibrous tissue that runs along the floor from the RA from the ICV anteriorly to the AV node
Tendon of Todaro
Lines the junction where the IVC and RA connect
Eustachian ridge
For later individuals or ones with well developed this ridge can be a challenge for ablations
Eustachian ridge
This slows atrial conductions and is known as an area of slow conduction
Cavotricuspid isthmus
The tissue between the oriface of the IVC and the attachment of the leaf of the tricuspid valve
Cavotricuspid Isthmus
What does the triangle of Koch consist of?
Tendon of Todaro, Bundle of HIS, Septal leaflet of the tricuspid annulus, CS os
Where is the Triangle of Koch located?
An imaginary region in the lower right atrial septum
Keeps the blood moving from the RA to the RV
RVOT
These contract to prevent prolapse of the tricuspid valve
Papillary muscles
These tighten or lengthen to open the valves
Chordae Tendineae
Prevents the ventricles from over stretching and can be an obstruction for placing catheters in the RV
Moderator band
On the epicardium between the LAA and Ostia of the left PV
Ridge of Marshall
Provides structural support for the Left PV and mitral Valve
Ridge of Marshall
Facilitates conduction between the left and right atria
Bauchmans bundle
Segment of HIS that transitions into the his bundle
Nodal his
Segment of HIS bundle that Contains cells that delays conduction
Nodal
Segment of the HIS that receives input form the crest terminals and intertribal septum
Atrial node
Separates the muscles wall from the atria to avoid the ventricles pacing 1-1 with the atria and are non conductive
Trigones
Where is the CS os located in reference to the tricuspid valve?
Posterior
Valve is found in front of CS and may make entry more challenging?
Thebesian
