What does the T on an ECG represent?
The T wave on the ECG (T-ECG) represents repolarization of the ventricular myocardium. Its morphology and duration are commonly used to diagnose pathology and assess risk of life-threatening ventricular arrhythmias.
What is ECG in simple words?
An electrocardiogram (ECG or EKG) is a test that checks how your heart is functioning by measuring the electrical activity of the heart. With each heart beat, an electrical impulse (or wave) travels through your heart. This wave causes the muscle to squeeze and pump blood from the heart.
What do P QRS and T represent?
The three main components are P wave, QRS complex and T wave. The P represents depolarization of the atria, QRS complex denotes the depolarization of the ventricles and finally, the T wave represents repolarization of the ventricles.
What does T wave axis mean?
The axis of the T-wave on the electrocardiogram (ECG) is a marker of ventricular repolarization that, when deviated from normal by more than 60 degrees in either direction in the frontal plane, has been strongly associated with an increased risk of fatal and non-fatal cardiac events in older adults (1) as well as all- …
What happens during T wave?
The T wave represents ventricular repolarization. Generally, the T wave exhibits a positive deflection. The reason for this is that the last cells to depolarize in the ventricles are the first to repolarize.
What is ECG class 11th?
Electrocardiograph (ECG) ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle. To obtain a standard ECG, a patient is connected to the machine with three electrical leads, one to each wrist and to the left ankle, that continuously monitor the heart activity.
What is an ECG Wikipedia?
Electrocardiography is the process of producing an electrocardiogram (ECG or EKG), a recording of the heart’s electrical activity. It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin.
What is P wave and T wave?
‘P’ wave is the first wave in an ECG and is a positive wave. It indicates the activation of the SA nodes. ‘T’ wave too is a positive wave and is the final wave in an ECG though sometimes an additional U wave may be seen. It represents ventricular relaxation. The p wave is also called the atrial complex.
How is the ECG interpreted in children?
The basic principles of interpretation of the ECG in children are identical to those in adults, but the progressive changes in anatomy and physiology which take place between birth and adolescence result in some features which differ significantly from the normal adult pattern and vary according to the age of the child.
What should be the sampling rate of an ECG in children?
This sampling rate is probably inadequate for the high frequency content of the ECG in young children. Most modern ECG recorders will sample at > 500 Hz or greater and observers should be aware of this fact when interpreting an ECG generated by such equipment.
When to request an electrocardiogram (ECG) for a child?
GUID: 99F76480-5D1E-4DDC-9F73-1AFD21E6D146 An electrocardiogram (ECG) may be requested as part of the investigation of a wide range of problems in paediatrics, often in patients who have no clinical evidence of cardiac disease.
What are ventricular ectopic couplets?
Ventricular ectopic couplets. Ventricular ectopic beats in couplets. Couplets indicate a higher potential for arrhythmia than isolated ventricular ectopic beats. If three ventricular ectopic beats occur in a sequence at a rate above 100 per minute is called a salvo or a short run of nonsustained ventricular tachycardia.