EC6001 ME Notes
Anna University Regulation 2013 Electronic Communications Engineering (ECE) EC6001 ME Notes for all 5 units are provided below. Download link for ECE 6th SEM EC6001 MEDIMEL ELECTRONICS Lecture Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.
EC6001 ME Notes
Characteristic waves of ECG:
P wave – Atrial depolarization
PQ segment – AV nodal delay
QRS complex – ventricular depolarization (atrial repolarization) ST segment – ventricular ejection period
T wave – ventricular repolarization
TP segment – ventricular filling period
Clinical significance: ECG record helps in the diagnosis of various heart arrhythmias such as tachycardia, bradycardia, heart block etc.
EEG: ElectroEncephaloGram: EEG is the record of sum of biopotentials generated by individual neurons or electrical activities of the brain.
Typical bandwidth: 0.1 – 100 Hz
Typical amplitude: 10 – 100 V
Typical waveform: Highly random
PCG: PhonoCardioGram: Record of heart sounds – 1st and 2nd heart sounds are heard well but 3rd and 4th are not. Heart sounds are generally used for diagnosis of valve- related diseases. Such abnormal heart sounds are called murmurs.
1st heart sound: due to closure of AV valves – long, soft & low-pitched sound – sounds like ‘lubb’ – 0.14-0.2 sec – 30-40 Hz.
2nd heart sound: due to closure of semilunar valves – short, sharp & high-pitched sound – sounds like ‘dub’ – 0.08-0.1 sec – 50-70 Hz.
3rd heart sound: due to ventricular vibrations resulting from on-rush of blood immediately after the opening of AV valves – very short – 0.04 sec.
4th heart sound: due to atrial contraction.
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