EKG readings requires support with other EKG wave forms, related sumptoms, clinical signs other evidence before making a diagnosis.
For an insight, the PR interval represents the time from the onset of atrial depolarization (contraction) to the onset of ventricular depolarization. It is a measured time on the surface ekg. A short PR interval may also occur as a normal variant,
The PR interval is considered normal if between .12 and .20 second. A mildly short PR interval may be seen with hypokalemia or hypocalcemia (abnormal levels of potassium, but your blood test is normal!). An artificially-short PR interval occurs when the QRS complex begins early, as happens with an extra conducting bundle — Wolff-Parkinson-White Syndrome (WPW)...do you have arrhythmia?
To support myocardial infarction (heart attack and damaged heart cells) there is marked ST elevation in the same area is consistent with a recent MI. If it persists and is present in an older infarction, it is associated with a wall motion abnormality or an aneurysm.
Also, Lateral infarcts are associated with diagnostic Q waves in at least 2 of the lateral leads, I,AVL, V4,5,6. This is the least common MI pattern and is associated with lesions and/or thrombus that occurred in the left circumflex coronary artery.
You can appreciate the complexity of a dx with just an EKG. There are no markers for an acute MI so that may/can be ruled out. If you have not had a heart attack then an old MI can be ruled out. If you don't have irregular heartbeats then WPW may be ruled out. etc.
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