As a medical professional with expertise in cardiology, I can explain the components of an electrocardiogram (ECG) in detail. The ECG is a crucial diagnostic tool that provides a graphical representation of the electrical activity of the heart over time. The QRS wave of the ECG is a key component that represents the depolarization of the ventricles. This process is critical because it initiates the contraction of the ventricles, which then pumps blood out to the body. The QRS complex is typically the most prominent part of the ECG and can be identified by its distinctive pattern: a sharp initial deflection followed by a slower, broader wave. Here's the explanation in English, followed by the translation in Chinese, separated by "read more >>

The first wave is the P wave, which represents the depolarization of the atria. This happens right before the atria contract and push blood into the ventricles. The next wave is called the QRS wave. This wave is much larger than the P wave, and it represents the depolarization of the ventricles.read more >>