Question 1

What is the Meaning of PPG Vs ECG?

Accepted Answer

PPG (Photoplethysmography) and ECG (Electrocardiography) are distinct physiological monitoring techniques, each providing unique insights into cardiovascular function. PPG assesses changes in blood volume within the microvasculature, typically reflecting pulsatile blood flow. ECG, conversely, records the electrical activity of the heart muscle, offering a detailed view of its conduction system.

Question 2

What is the Context of PPG Vs ECG?

Accepted Answer

Both methodologies serve to monitor aspects of cardiovascular performance, yet they operate on fundamentally different biophysical principles. ECG is the established clinical standard for evaluating the heart's electrical conduction and rhythm. PPG, frequently integrated into consumer health devices, provides insights into peripheral circulation dynamics and pulse rate.

Question 3

What is the Significance of PPG Vs ECG?

Accepted Answer

ECG is indispensable for diagnosing cardiac arrhythmias, myocardial ischemia, and other electrical abnormalities of the heart, guiding critical clinical decisions. PPG offers a convenient, non-invasive means for continuous heart rate tracking and peripheral oxygen saturation estimation, serving as a valuable tool for general health awareness and early detection of physiological trends.

Question 4

What is the Mechanism of PPG Vs ECG?

Accepted Answer

ECG operates by detecting the tiny electrical potentials generated by the heart's depolarization and repolarization cycles, capturing these signals via electrodes placed on the skin surface. PPG, in contrast, utilizes a light source and a photodetector; it measures the absorption and reflection of light by changes in blood volume in the underlying tissue during each cardiac cycle.

Question 5

What is the Application of PPG Vs ECG?

Accepted Answer

Clinically, ECG is applied in diagnostic tests, cardiac stress assessments, and continuous monitoring in hospital settings to evaluate heart rhythm and structure comprehensively. PPG is widely implemented in wearable technologies like smartwatches and pulse oximeters, allowing individuals to monitor heart rate, heart rate variability, and blood oxygen levels during daily activities or exercise.

Question 6

What is the Metric of PPG Vs ECG?

Accepted Answer

ECG output is a complex waveform tracing, quantified by parameters such as heart rate, PR interval, QRS duration, and QT interval, which clinicians interpret for cardiac health and pathology. PPG data is typically processed to derive pulse rate and oxygen saturation (SpO2), presented as numerical values or simpler waveforms, indicating perfusion and oxygenation status.

Question 7

What is the Risk of PPG Vs ECG?

Accepted Answer

ECG poses minimal direct physical risk, mainly minor skin irritation from electrode adhesion; the primary concern lies in misinterpretation of complex waveforms by untrained individuals. PPG, while very safe and non-invasive, can yield inaccurate readings due to motion artifacts, poor sensor contact, or compromised peripheral circulation, potentially leading to misinformed self-assessments if not clinically verified.

PPG Vs ECG

Meaning

Context

Significance

Mechanism

Application

Metric

Risk

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