Basic Electrophysiology
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| show | Packemaker cells
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| show | Automaticity
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| Also called irritability referes to the ability of cardiac muscle cells to respond to an outside stimulus | show 🗑
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| show | Conductivity
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| The ability of myocardial cells to shorten in response to an impulse which results in contraction | show 🗑
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| show | Current
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| The measurement of potential energy is | show 🗑
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| show | Electrolytes
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| Five phase cycle that reflects the difference in the concentration of these charged particles across the cell membrane at any given time | show 🗑
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| When the inside of a cell is more negative then the outside | show 🗑
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| The voltage (difference in electrical charges) across the cell membrane | show 🗑
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| show | Permeable
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| show | Depolarization
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| show | Repolarazition
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| Phases 1,2,3 are referred to as | show 🗑
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| show | Electrical diastole
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| show | Phase 0
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| During this phase the NA+ channels partially close, slowing the flow of NA+ into the cell. At the same time CL- enters and K+ leaves. Resulting in a decrease in the # of positive electrical charges within the cell | show 🗑
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| The plateau phase. During this phase the CA++ slowley enters the cell as K+ continues to leave the cell slowley. It allows cardiac muscle to sustain an increased period of contraction | show 🗑
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| show | Phase 3
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| show | Phase 4
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| show | Absolute refractory period aka Effective refractory period
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| show | Relative refractory period aka Vulnerable period
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| show | Supernomral period
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| The soecialized electrical cells in the heart are arranged in a system of pathways called | show 🗑
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| When the AV junction is bypassed by an abnormal pathway the route is called | show 🗑
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| show | II, III, aVF
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| show | V1 and V2
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| show | V3 and V4
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| show | I, aVL, V5, and V6
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| It represents the spread of the impulse through the AV node, bundle of His, right and left bundle brnaches and the Purkinje fibers. It normally shortens as heart rate increases | show 🗑
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| Normal rate for PR interval | show 🗑
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| show | QT Interval
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| show | under .38 secs
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| show | PR segment
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| It represents the early part of repolarazition of the right and left ventricels | show 🗑
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| show | .5 to +2mm
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| Represents atrial depolarazition | show 🗑
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| Duration of a P wave | show 🗑
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| show | QRS Complex
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| Duration of a QRS complex | show 🗑
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| Represents ventricluar repolarazition | show 🗑
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| The primary pacemaker | show 🗑
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| show | .20 secs
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| show | Right and left bundle branches
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| On the ECG the time necessary fot the spread of an electrical impulse through the AV nodes, bundle of His, right and left bundle branches and the purkinje fibers is represented by the | show 🗑
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| The portion of the ECG tracing used to determine the degree of ST segment displacement | show 🗑
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| show | AV Node
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| show | 1 second
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| show | Right ventricle and posterios surface of the left ventricle
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| show | Acute injury pattern
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| show | Segment
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| show | Reentry
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| show | Myocardial cells
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| show | Artifact
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| show | Interval
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| The relative refractory period is also called | show 🗑
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| An ECG machine is a sophisticated ? | show 🗑
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| show | Pericarditis
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| An important electrolye that affects cardiac function | show 🗑
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| show | Membrane potential
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| The amplitude of a waveform is measured in | show 🗑
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| The ability of cardiac muscle cells to respond to an outside stimulus | show 🗑
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| show | Augmented
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| In leads I and II the right arm is | show 🗑
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| show | Epinephrine
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| show | Escape
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| Several waveforms | show 🗑
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| The spread of an impulse through tissue already stimulated | show 🗑
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| When the inside of a cell is more negative then the outside | show 🗑
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| show | Chemical
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| show | Sodium
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| show | Positive electrode
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| show | 60-100
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| Rtae of the AV node | show 🗑
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| rate of the ventricles | show 🗑
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| show | 1.Automaticity 2.Excitability 3. Conductivity 4.Contractility
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