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Phlebotomy Essentials
Phlebotomy Essentials
6th Edition
ISBN:9781451194524
Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Chapter1: Phlebotomy: Past And Present And The Healthcare Setting
Section: Chapter Questions
Problem 1SRQ
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Identify the following:

 
Sinus Tachycardia
 
 
 
 
  
Sinus Bradycardia
 
 
 
 
  
Sinus Arrhythmia
 
 
 
 
  
Sinus Arrest
 
This image displays an electrocardiogram (ECG or EKG), which is a graphical representation of the electrical activity of the heart. The graph consists of a repetitive sequence of waves and complexes, each representing different phases of the cardiac cycle. The key components observed in the ECG include: 1. **P Wave**: This wave represents atrial depolarization, which is the electrical impulse moving through the atria, causing them to contract. 2. **QRS Complex**: A large, sharp wave that indicates ventricular depolarization and the main pump of the heart as the ventricles contract. It typically consists of three deflections: - Q Wave: A small downward deflection after the P wave. - R Wave: A large upward deflection. - S Wave: A downward deflection following the R wave. 3. **T Wave**: This wave follows the QRS complex and represents ventricular repolarization, which occurs when the ventricles reset electrically and prepare for the next cycle. The pink grid in the background helps measure the duration and amplitude of the various waves. Each small square on the grid usually represents 0.04 seconds on the horizontal axis (time) and 0.1 millivolts on the vertical axis (voltage). The regularity and shape of the waves can give significant insights into heart function, identifying conditions such as arrhythmias or other cardiac anomalies.
Transcribed Image Text:This image displays an electrocardiogram (ECG or EKG), which is a graphical representation of the electrical activity of the heart. The graph consists of a repetitive sequence of waves and complexes, each representing different phases of the cardiac cycle. The key components observed in the ECG include: 1. **P Wave**: This wave represents atrial depolarization, which is the electrical impulse moving through the atria, causing them to contract. 2. **QRS Complex**: A large, sharp wave that indicates ventricular depolarization and the main pump of the heart as the ventricles contract. It typically consists of three deflections: - Q Wave: A small downward deflection after the P wave. - R Wave: A large upward deflection. - S Wave: A downward deflection following the R wave. 3. **T Wave**: This wave follows the QRS complex and represents ventricular repolarization, which occurs when the ventricles reset electrically and prepare for the next cycle. The pink grid in the background helps measure the duration and amplitude of the various waves. Each small square on the grid usually represents 0.04 seconds on the horizontal axis (time) and 0.1 millivolts on the vertical axis (voltage). The regularity and shape of the waves can give significant insights into heart function, identifying conditions such as arrhythmias or other cardiac anomalies.
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