Welcome to my class Identity Name khadiza akter

Welcome to my class

Identity Name: khadiza akter Designation: junior instructor(I. P. C. T)

Class Introduction DEPERTMENT: I. P. C. T SEMESTER: 5 TH SUBJECT: MEDICAL INSTRUMENTATION CODE: 69154 TIME: 45 minute

CHAPTER: 02 ARTICLE: 2. 5 TODAYS TOPIC NAME: Characteristics of ECG MACHINE

CHARACTERISTICS CURVE OF ECG

EXPLAIN OF ECG CURVE P-wave: 1. It is a small upward wave that appears first 2. It indicates atrial depolarization (systole), during which excitation spreads from SA node to all over atrium About 0. 1 second after P-wave begins, atria contracts. 3. Hence P-wave represents atrial systole QRS wave: 1. It is the second wave that begins as a little downward wave but continues as a large upright triangular wave and ends as downward wave 2. It represents the ventricular depolarization (systole) Just after QRS wave begins, ventricles starts to contracts. Hence QRS wave represents ventricular systole

• T- wave: – It is third small wave in the form of a dome-shaped upward deflection. – It indicates ventricular repolarization (diastole) – It also represents the beginning of ventricular diastole – ** ATRIAL DIASTOLE MERGES WITH QRS-WAVE • P-R interval: – It represents the time required for an impulse to travel through the atria, AV node and bundle of his to reach ventricles. • S-T segment: – It is measured from the end of S to the beginning of Twave – It represents the time when ventricular fibres are fully depolarized.

HOME WORK DRAW THE ECG CHARACTERISTICS CURVE AND EXPLAIN IT.

In the nest class topic name demand type syncronous pacemaker working principle ANY QUESTION FOR TODAYS TOPIC

EVALUTE THE LESSION 1. DRAW THE CAHRACTERISTICS CURVE OF ECG MACHINE.