Which wave of the QRS-complex has the largest amplitude in Lead II and why is this...

Which wave of the QRS-complex has the largest amplitude in Lead II and why is this so?

Expert Solution

The shape and polarity of P,Q,R,S and T waves will vary in different leads due to differences in the orientation of each lead with respect to the heart.

Configuration - QRS Complex : QRS complex consists of three consecutive waves. Q wave is a small negative wave which may be absent normally (quite often). It continued as a tall positive R wave which is followed by a small negative S wave. QRS complex is caused by a ventricular depolarization.

(Note :QRS complex from the precordial leads are more important than the limb leads.)

In the bipolar limb leads (Lead I , Lead II and Lead III ) ,the Q wave and the S wave are usually negative and low-amplitude compared to the dominant positive R wave

In electrocardiography, electrical current flowing toward a positive electrode results in a positive (upright) waveform display. Electrical current flowing away from the positive electrode results in a negative (downward) waveform display. In Lead II , the R wave is therefore positive.

The closer the mean QRS axis is to the electrical axis of Lead II, the larger the amplitude of the R wave.

Amplitude : Q wave is 0.1-0.2 mV

R wave is 1.0 mV

S wave is 0.4 mV

Tall R wave (more than 1.3 mV) is seen in ventricular hypertrophy.

Sydney Mullin answered 1 year ago

if someone's heart skips a QRS complex and T-wave, why would they be fatigued? provide a...

if someone's heart skips a QRS complex and T-wave, why would they be fatigued? provide a mechanism

1. A sinusoidal voltage wave on a transmission line has real amplitude, V_0. The wave is...

1. A sinusoidal voltage wave on a transmission line has real amplitude, V_0. The wave is expressed in phasor form as V_s(z) = V_0*e^(-alpha*z)*e^(-j*(beta)*z) a. In which direction does this wave propagate and why? b. Express the given wave in real instantaneous form. c. The parameters of the line, operating at ω= 6.0×10^8 rad/s are L = 0.350 μH/m, C = 40.0 pF/m, G = 0 and R = 15.0 Ω/m. Find α,β,λ, andZ_0 (in magnitude and phase). d. Calculate...

Given two wave that has the same amplitude, frequency and direction that they are traveling in,...

Given two wave that has the same amplitude, frequency and direction that they are traveling in, BUT they have a phase that is a difference of 2Pi. When one adds both waves up we get: a) Nothing b) A wave with twice the wavelength of the original c) A wave with twice the amplitude of the original d) A wave with twice the frequency of the original e) None of the above

A transverse traveling wave on a taut wire has an amplitude of0.200 mm and a frequency...

A transverse traveling wave on a taut wire has an amplitude of0.200 mm and a frequency of 530 Hz. Ittravels with a speed of 196 m/s. (a) If the wave equation is written in the formy = A sin(kx - ωt), whatare the parameters A, k, andω? 1 m 2 rad/m 3 rad/s (b) The mass per unit length of this wire is 3.50 g/m. Find the tension in the wire. 4 N

Use the following information to answer parts a and b. Wave 1 has an amplitude of...

Use the following information to answer parts a and b. Wave 1 has an amplitude of 40.0 cm, and Wave 2 has an amplitude of 15.0 cm. a) If the two waves constructively interfere, what is the maximum possible amplitude of their combined wave? b) If the two waves were constructively interfering, but Wave 1 was shifted by 6π radians, would the change create constructive, destructive, or intermediate interference? Explain. c) If the two waves destructively interfere, what is the...

A transverse traveling wave on a taut copper wire has an amplitude of 0.200 mm and...

A transverse traveling wave on a taut copper wire has an amplitude of 0.200 mm and a frequency of 500 Hz. It travels with a speed of 100 m/s. (a) Write an equation in SI units of the form y = A sin (kx − ωt) for this wave. (Do not forget units in your answer.) (b)Find the transverse velocity of the wire at the position x=0.500m at time t=1.00×10-3 s. (c) The diameter of the wire is 1.00 mm,...

A sound wave in air at 20 Celsius has a frequency of 151 Hz and a displacement amplitude of...

A sound wave in air at 20 Celsius has a frequency of 151 Hz and a displacement amplitude of 5.40×10-3 mm.Part AFor this sound wave calculate the pressure amplitude (in Pa).Use 1.42×105 Pa for the adiabatic bulk modulus.Pmax= 2.11 PaPart BFind the intensity of the waveUse 1.20 kg/m^3 for the density of air.I=?

A company such as Intel has a complex design and manufacturing process. This should lead Intel...

A company such as Intel has a complex design and manufacturing process. This should lead Intel management to be concerned with scale of production and learning curves. When do you think managers should be more concerned with large-scale production runs, and when do you think they should be most concerned with practices that would foster or hinder the hiring, training, and retention of key employees? Describe a firm you think has been highly innovative. Which of the four types of...

which wave has the shorter wavelength, and which has the longer wavelength

If matter has a wave nature, why is this wave-like characteristic not observable in our daily...

If matter has a wave nature, why is this wave-like characteristic not observable in our daily experiences? Any object of macroscopic size—including a grain of dust—has an undetectably small wavelength, so any diffraction effects it might exhibit are very small, effectively undetectable. Recall historically how the diffraction of sound waves was at one time well known, but the diffraction of light was not. Only objects of macroscopic size, like an ocean wave, actually exhibit a wave nature. Smaller, microscopic objects—including...

Question