Cardiophysiology - Winden Flashcards
atrophy
reduction in the size of the cell
hypertrophy
increase in the size of the cell
inotropy
how hard the heart is beating
chonotropy
how fast the heart is beating
dromotropy
how fast the conduction is
tachychardia
fast pace beating
bradychardia
slow pace beating
arrhythmia
irregular pattern
What are the two different types of heart cells?
Conducting- controls and coordinates heartbeat
Contracting- produces contractions that produce the heartbeat
Where are the majority of Purkinje cells?
Near the apex of the heart to contract the ventricles
What are the resting potentials of atrial and ventricular cells?
Atrial- 80 mV
Ventricular- 90 mV
What are the phases of a contraction?
latent, contractile, refractory, relaxation
What is important of calcium with cardiac cells?
Sensitive to extracellular calcium and is dependent on it
Follow the pathway of a contraction from the SA node
SA node, internodal pathway, AV node, bundle branches, purkinje fibers
When following an ECG:
What is the P wave
Atria depolarizes (contracts)
