PHYSIOLOGY > ECG > Flashcards

ECG Flashcards

(18 cards)

Study These Flashcards
1
Q

P wave

A
  • depolarization of ATRIUM
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2
Q

QRS wave

A
  • VENTRICULAR depolarization

-

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3
Q

T wave

A
  • VENTRICULAR REPOLARIZATION
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4
Q

PR segment

A
  • time from SA node to get to AV node
  • time of conductance
  • LONG is slow
  • SHORT is fast
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5
Q

ST segment

A
  • to know and differentiate ischemia(insufficient blood) and infarction(dead tissue)
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6
Q

QT interval

A
  • ventricular refractoriness
  • normal heart (60-100 bpm)
  • interval is between 0.35-0.44 sec.
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7
Q

prolonged QT interval

A
  • rhythm problem

- arrhythmia

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8
Q

PR interval

A
  • AV block
  • all types of block
  • conduction defects
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9
Q

phase 0

A
  • rapid inward flux of SODIUM
  • POSITIVE
  • VENTRICULAR DEPOLARIZATION
  • QRS
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10
Q

each box

A
  • is 200 big box msec

- 5 small box

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11
Q

partial ( 1 degree ) block

A
  • slowed conduction through the AV node
  • PR interval increased (>200 sec)
  • wide
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12
Q 
second degree block
mobitz I ( wenckebach)
A
  • PR interval progressively lengthens

- drop beats no beats

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13
Q

second degree block

mobitz II

A
  • no measurable lengthening of PR interval
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14
Q

third degree (complete heart block) block

A
  • no synchrony in AV node and SA node
  • atrium 60-100 bpm SA node
  • ventricle 30-40 bpm AV node
  • atria and ventricle beats independently
  • beats bounce to the neck veins
  • frequency of P wave>QRS complexes
  • low HR is associated with lower than normal CO and syncope
  • implantation of pacemaker can alleviate the problems
  • ssx: bradycardia, neck vein bulging pulsation, syncope, lightheadedness, hypotension
  • best initial treatment: ATROPINE by blocking vagal stimulation
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15
Q

towards the positive ends

A
  • upward deflection
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16
Q

majority of the weight of the heart is in the

17
Q

thicker and heavier

Study These Flashcards
A
  • LEFT VENTRICLE
  • 120 mm Hg
  • pressure in the LV is what we called AFTERLOAD
18
Q

SYSTOLIC PREESURE IN

Study These Flashcards
A
  • RV is 20-25 mm Hg
PHYSIOLOGY
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