🔹Two main coronary arteries emanate from the aortic bulb :
• Right coronary artery (RCA)
originates on the right aspect of the aortic bulb.
• Left main coronary artery (LMCA) originates from eft anterior aspect of aortic bulb.
🔹LMCA is short and branches into the two arteries supplying the anterior and left side of the heart, as follows:
• The left anterior descending coronary artery
(LAD).
• The left circumflex coronary artery (LCX).
How to Measure QT Interval and Calculate the QTc : Thread 2/4
🫀Normal QT Interval Measurement
General rule: QT interval should be < 1/2 RR interval
- Only works at normal heart rates!
Bazett's Formula:
QTc = QT / Sqrt(RR)
(RR in seconds)
🔹LMCA is short and branches into the two arteries supplying the anterior and left side of the heart, as follows:
How to Measure QT Interval and Calculate the QTc : Thread 2/4