2.2 Flashcards by shir nov

Q

P wave represents

A

atrium depolarization

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Q

QRS complex represents

A

ventricular depolarization

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Q

where can we find atrial repolarization?

A

hidden inside the QRS complex

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Q

T wave represents

A

ventricular repolarization

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Q

duration of PQ (or PR) interval?

A

0.12-0.2 sec

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Q

duration of QRS complex?

A

0.06-0.1 sec

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Q

duration of P wave?

A

0.12 sec

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Q

amplitude of ST?

A

0.1-0.2 mV

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Q

amplitude of R and T waves in lead II

A

R > 5 mm

T < 5 mm

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Q

what do ECG measures?

how?

A

measure changes in potential (cardiac myocytes)

uses surface electrodes

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Q

Einthoven detects Bipolar/Unipolar?

A

Bipolar electrodes

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Q

what is the Einthoven rule?

A

potential difference in lead II is the sum of potential difference in I+III

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Q

lead II is btw

A

RA (–) to LL (++)

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