Dec 14, 2016 · Question 16 1 out of 1 points What portion of the EKG wave pertains to the atria undergoing depolarization? Selected Answer: B. P wave Selected Answer : B. P wave
Aug 05, 2018 · Answer: e Question 9 1 out of 1 points Which portion of the EKG wave pertains to the atria undergoing depolarization? Selected Answer: P wave. Selected Answer : P wave ... Course Hero is not sponsored or endorsed by any college or university. ...
Nov 09, 2020 · Question 22 1 out of 1 points Which portion of the EKG wave pertains to the atria undergoing depolarization? Selected Answer: P wave Question 23 1 out of 1 points Of all the blood vessels, veins contain the thickest tunica media, which allows them to have a dramatic influence on blood pressure.
• Describe the 5 phases of cardiac depolarization-repolarization. • Draw and label the normal EKG waveform, P to U and explain each part of the wave. • Discuss how different leads represent the heart. • Explain placement of electrodes for 12-lead, 5-lead, and 3-lead EKGs. • Outline 9 steps in interpreting the EKG.
The purpose of this course is to familiarize the nurse with different types of EKGs and the EKG waveform and to help the nurse to identify both normal and abnormal EKG findings.
The heart goes through 5 phases of depolarization-repolarization: . 0: Period of rapid depolarization (contraction) during which sodium and calcium channels are open and sodium moves quickly into the cell and calcium more slowly. 1: Early repolarization during which the sodium channels close.
With each heartbeat, the heart pumps about 60 to 90 mL resulting in circulation of 5 to 7 liters of blood every minute and 7600 liters per day with an average heart rate of 70 beats per minute. The normal heart ejects about 65% of the intraventricular volume in each cardiac cycle (referred to as the ejection fraction).
Blood enters the heart through the superior vena cava into the right atrium. When the pressure in the right atrium exceeds that of the pressure in the right ventricle, the tricuspid valve opens, allowing the blood to flow into the ventricle until the pressure increases in the ventricle, forcing the tricuspid valve to close.
An electrocardiogram (EKG, ECG) is a record of the electrical activity of the heart. While the EKG cannot provide information about the mechanical functioning of the heart, it can demonstrate the rate and rhythm and abnormalities in conduction. Additionally, changes in
When determining whether the QT interval is prolonged, measure the distance between the RR interval and check where the T wave ends. If the T wave ends past the halfway duration of the R-R interval, then the Q-T interval is prolonged.
Atrial systole (atrial kick): Provides the additional 30% of blood for the ventricles. The atrial kick (contraction of the atria) occurs with depolarization of atrial myocardial cells at the sinoatrial node (P wave) and is essential for adequate filling of the ventricles. Cardiac conduction: .