I can see health

Chapter 286 Exchange for Intermediate Cards!
So here comes the question, how to judge whether the P wave is interference?

Lu Chen thought of the "Einthoven" triangle.

The electrocardiogram was invented by Professor Einthoven. He named the recorded electrocardiogram waves as PQRST waves, and this naming method is still in use today.

Through the principle of the "Einthoven" triangle, you can judge whether the P wave is interference or not!

"It's time for it to come out and clean up the scene!" Lu Chen thought in his heart.

After the model of the "Einthoven" triangle, Lu Chen came to a conclusion.

In the second picture, there is really interference!

It is precisely because of the interference that these small p's appear.

Among them, there is no lead III, indicating that the interference comes from the left upper limb.

Therefore, how to troubleshoot interference is also an important part of the ECG!
Because it is very easy to be disturbed when doing an electrocardiogram, and sometimes the interference is so perfect, then the "Einthoven" triangle will show its importance at this time!

After Lu Chen then used the "Einthoven" triangle to clean up these small ps, things became very simple!

The overall rhythm is still a junctional escape rhythm.

From the perspective of the three ECGs on the whole macroscopically, it is in line with the diagnosis of junctional escape rhythm.

When Lu Chen focused his attention on the single lead II again, he found that the interval between the leads was fixed.

He immediately considered a diagnosis - complete junctional repetitive beat rhythm!
Repeated pulsation, also known as repetitive heart rhythm, refers to the excitation of a chamber of the heart that depolarizes the chamber, and then excites the opposite chamber through conduction.

At the same time, the conduction direction of the excitation may suddenly turn back and reverse the conduction, and it is an electrocardiographic phenomenon that the cardiac chamber from which the original excitation originates is excited again.

……

Lu Chen also discovered something more interesting.

In this electrocardiogram, the joint rhythm interval formed by sinus and atrial premature is exactly the same as the joint rhythm interval of sinus rhythm and premature atrial after the blood potassium is restored, both are 540ms!

What does this indicate?

This further shows that the combination of a pair of rules with reverse P in the middle is not atrial premature bigeminy, but junctional repetitive beats are more reasonable.

In addition, comparing the electrocardiogram before and after serum potassium recovery, the P wave in lead II is consistent with this P wave, both positive and negative, so this electrocardiogram still has escape-capture heart rhythm!

After analyzing it up to now, this part of the second electrocardiogram is ready to come out.

Its final answer is, junctional escape rhythm + complete junctional repetitive beat bigeminy + escape-capture rhythm + atrial premature beats with poor transmission.

……

When Lu Chen sent the final diagnosis of the second ECG to the group, while everyone in the group was amazed, they also admired Lu Chen in their hearts.

Who would have thought that part of the P wave and inverse P in the electrocardiogram is actually interference? !

The waveform of this interference looks the same as a normal P wave.

"By applying the 'Einthoven' triangle, we can eliminate these disturbances."

Lu Chen reedited the electrocardiogram in the group, and marked all the disturbing waveforms so that everyone can understand them at a glance.

After removing the interference waves, although this ECG is still difficult to interpret, it is not an unsolvable graph!

In his rental house, Fan Zhiping was amazed at Lu Chen's answer.

Really worthy of being "Professor Lu"!

The interference waveform that no one expected was thought of by Lu Chen!
After the people in the group got the diagnosis, they also started bursting with rainbow farts.

"Professor Lu will know if there is one as soon as he makes a move..."

"Professor Lu, the director asked me why I was kneeling and looking at my phone."

"Professor Lu Chen is awesome!"

……

At this time, prompts popped up constantly on Lu Chen's system panel.

"Congratulations, I received +1 from Fan Zhiping!"

"Congratulations, I received the thank you from He Xi +1!"

"Congratulations, I received a thank you from Li Jiaxin +1!"

"..."

In just a few minutes, Lu Chen's gratitude value skyrocketed again, directly breaking through the 300 mark!

It was eleven o'clock in the evening, but he didn't feel sleepy at all.

With a thought, the system mall was summoned.

"Exchange ECG Advanced Skill Card!"

Ding!
"Congratulations, you have obtained the electrocardiogram skill card (intermediate level)."

The ECG-level skill card not only contains higher-level ECG-related knowledge, but also includes electrophysiological knowledge.

Lu Chen felt his brain heat up, as if countless knowledge poured into his mind.

However, all this knowledge has been closed for the time being, requiring Lu Chen to spend time reading to comprehend it.

"Great!" Lu Chen was overjoyed.

After exchanging this intermediate skill card, Lu Chen has a little more confidence in the third round of exams the day after tomorrow.

Otherwise, with his current ability, it would be almost impossible to break through the provincial competition and enter the national competition!
It was already night, and everyone else in the dormitory was already asleep.

Lu Chen resisted his urge to get up and read a book, slowly closed his eyes, and began to fall asleep...

……

Silent all night.

the next day.

After Lu Chen got up and washed up, he asked Teacher Li Yao for leave. The reason was naturally to prepare for the third round of exams.

Li Yao received a call from Lu Chen.

"Okay, you hand over the patients you manage to Sun Guoguo. You have already achieved a lot in this ECG competition. Next, do your best and don't push yourself too much."

"Well, thank you teacher."

Lu Chen hung up the phone, first went to the eighth district of Xinxin, and handed over his patient to Sun Guoguo.

Everyone in District [-] also knew that Lu Chen would participate in the third round tomorrow afternoon.

"Junior brother, come on!" Sun Guoguo smiled and said to Lu Chen.

"Lu Chen, when you enter the national competition, then I can brag to my classmates!" Fatty Cheng leaned in front of Lu Chen.

Jiang Qingyan and Ke Yue at the side also encouraged Lu Chen.

However, having said that, everyone didn't have much hope for Lu Chen's result in the third round!

After all, Lu Chen is No.9 in the second round, and the probability of breaking through to the top three is pitifully small.

And now the top three people are all well-known doctors in Jinghua's electrophysiology field, and Lu Chen is just a first-year student.

……

After leaving the eighth district of the heart, Lu Chen came to the teaching building, found a spare classroom, and started his electrophysiology study.

With the super high comprehension ability endowed by the advanced skill card of electrocardiogram, Lu Chen found that the electrophysiological knowledge that was difficult for him to understand before has become easy to understand now.

Many problems that I didn't understand before are now solved easily!

However, the third round of exams will be held at two o'clock tomorrow afternoon.

In less than a day and a half, Lu Chen needs to give full play to the advantages of the intermediate skill cards to improve his electrophysiological knowledge!
Lu Chen spent the whole day studying electrophysiology.

Three o'clock in the afternoon the next day.

The third round of the provincial competition of Huaxia Electrocardiogram Contest officially begins!
(End of this chapter)