Term
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Definition
-determine HR
-determine heart rhythm
-evaluate conduction abnormalities, chamber enlargement by eval. PQRST |
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Term
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Definition
-electrical stimulation of heart muscle causing contraction
-electrolytes Na+, Ca+ move into cell
-systole when ventricle depolarizes |
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Term
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Definition
-heart muscle relaxation occurs when K+ moves out of cardiac muscle cells, leading to relaxation of muscle
-diastole when ventricle repolarizes |
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Term
| Systole occurs when the (chamber) (re/de-polarizes). |
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Definition
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Term
| Diastole occurs when the (chamber) (re/de-polarizes). |
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Definition
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Term
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Definition
| a slender bundle of modified cardiac muscle that passes from the atrioventricular node in the right atrium to the right and left ventricles by way of the septum and that maintains the normal sequence of the heartbeat by conducting the wave of excitation from the right atrium to the ventricles |
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Term
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Definition
| specialized cardiomyocytes that are able to conduct cardiac action potentials more quickly and efficiently than any other cells in the heart. Purkinje fibers allow the heart's conduction system to create synchronized contractions of its ventricles, and are, therefore, essential for maintaining a consistent heart rhythm. |
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Term
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Definition
Clip: electrodes that attach to patient
Lead: recordings taken from different locations using two or more electrode placements on body |
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Term
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Definition
Front Limb: caudal, proximal to elbow
Hind Limb: cranial, proximal to stifle |
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Term
| ECG leads most used in animals: |
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Definition
I, II, III - just need 2 clips
aVR
aVL
aVF |
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Term
| You need only __ clips to do all __ leads. |
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Definition
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Term
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Definition
| ventricular depolarization / contraction (systole) |
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Term
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Definition
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Term
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Definition
| ventricular repolarization / relaxation (diastole) |
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Term
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Definition
| depolarization of atria; duration = time for pulse to pass from SA node to AV node |
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Term
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Definition
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Term
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Definition
| activation of AV junction |
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Term
| QRS complex represents... |
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Definition
| depolarization of the ventricles (contraction) |
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Term
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Definition
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Term
| S-T segment represents... |
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Definition
| time from end of QRS to onset of T wave (early vent. repol.) |
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Term
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Definition
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Term
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Definition
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Term
| What paper speed has easier to read ECGs? |
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Definition
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Term
| What paper speed saves paper but makes ECGs harder to read? |
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Definition
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Term
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Definition
| measuring between P waves and R waves (P-P should all be equal, R-R should all be equal) |
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Term
| If a time span on the ECG only contains 2 R waves, how do you calculate the HR? |
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Definition
50mm/sec paper:
count mm between two Rs, and 3000/mm = Bpm
25mm/sec paper:
count mm between 2 Rs, and 1500/mm = Bpm |
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Term
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Definition
Amplitude = height (vertical)
Length = seconds (horizontal) |
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Term
| Assess rhythm by measuring between... |
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Definition
P waves, and R waves
-Are P-Ps equal? Are R-Rs equal? Is there a P for every QRS? Any "no" indicates abnormal rhythm |
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Term
| How to get a more accurate HR from ECG? |
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Definition
| always count two intervals |
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Term
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Definition
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Term
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Definition
P-Ps equal
R-Rs equal
P for every QRS
no arrhythmia, "normal slow" |
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Term
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Definition
P-Ps equal
R-Rs equal
P for every QRS
no arrhythmia, "normal fast" |
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Term
| What is the "pacemaker" of the heart? |
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Definition
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Term
| The SA node signals the ___ to contract. |
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Definition
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Term
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Definition
| Atrial Premature Contraction |
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Term
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Definition
-irritated atrium
-electrolyte imbalance
-toxins
-atrial enlargement |
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Term
| Atrial Premature Contraction |
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Definition
P-Ps not equal
R-Rs not equal
not a P for every QRS (lacking Ps) |
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Term
| An ECG of an APC shows what special feature? |
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Definition
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Term
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Definition
P-Ps not equal
R-Rs not equal
not a P for every QRS (lacking Ps) |
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Term
| Definition of Atrial Tachycardia? |
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Definition
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Term
| In Atrial Tachycardia and APCs, what is normal and abnormal about the ECG? |
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Definition
| P is abnormal, QRS is fine |
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Term
| What can you do if a patient is having atrial tachycardia? |
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Definition
| press eyeballs for vagal effect |
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Term
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Definition
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Term
| In Atrial Fibrillation, what is normal and abnormal about the ECG? |
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Definition
| No Ps, just f waves (fibrillations), QRS is fine |
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Term
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Definition
P-Ps not normal- f waves in place of Ps
R-Rs not normal
not a P for every QRS (lacking Ps) |
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