The 12-lead ECG has numerous potential clinical uses. It serves as the criterion standard for noninvasive diagnosis of arrhythmias and conduction disturbances, and occasionally it is the only marker for the presence of heart disease.
Why is ECG lead placement important?
The system of positioning of leads for performing a 12-lead ECG is universal. This helps to ensure that, when a persons ECGs are compared, any changes on the ECG are due to cardiac injury, not a difference in placement of leads, this is extremely important with the increasing use of foreign travel.
What are the symptoms of heart blockage?
If a person has a heart block, they may experience:slow or irregular heartbeats, or palpitations.shortness of breath.lightheadedness and fainting.pain or discomfort in the chest.difficulty in doing exercise, due to the lack of blood being pumped around the body.