QRS complex

what your doctor sees when he looks at an ECG printout, let's focus on a single beat from a single electrode. Alright, I agree. That's certainly pretty meaningless at first glance. However, with a little decoding, it starts to make much more sense. In fact, the heartbeat as represented in an ECG breaks down into four primary pieces: the PR interval, the Q wave, the QRS complex, and the T wave. Let's explore them for a bit. (Refer back to the graphic as needed.) The PR interval on the left side of the graph shows the electrical impulse for the contraction of the atria, immediately followed by its depolarization (or clearing of the electrical charge to that part of the heart muscle) so it can relax and gear up for the next contraction. As mentioned earlier, the actual contraction of the muscle follows the signal by about 1/10 of a second -- in this case during the PR segment. The Q wave (labeled Q above) is the initial downward (negative) deflection related to the initial phase of depolarization of the ventricular heart muscle. Again, depolarization is preparation for receiving an electrical stimulus. The QRS complex in the center of the graphic shows the electrical stimulation of the ventricles, immediately followed by their depolarization. Not surprisingly (considering how much more powerful ventricular contraction is), the amplitude of the electrical signal for the ventricles is much larger than that of the atria. The T wave on the right side shows the repolarization of…

Wave Forms The P wave represents atrial depolarization. When the sinus node is in control, there should be a P wave for each and every QRS complex. Typically, sinus P waves do not plot through an ectopic from atrial tissue, since the premature atrial depolarization will reset the sinus cadence called a premature atrial complex (Blesi/Jones/Lewis pg136). The P waves is when the valves between the atria and ventricles open 70% of the blood in the atria and the atrial contraction is only…

-Your heart beat works from the electrical impulses that travel down pathways through your heart. The normal sinus rhythm is initiated by the SA node also known as the sinoatrial node. It is also known as the hearts natural pacemaker due to the fact it beat 100 bpm. The electrical activity then spreads through the wall of the atria and as a result causes them to contract before it reaches the AV node. From there the AV node conducts electrical impulses from the atria to the ventricles while…

The five main usages of internet of things would be the following: Optical Tags and Quick Response Codes, Bluetooth Low Energy, RFID and Near-Field Communication, Wi-Fi, and Li-Fi. Optical Tags and Quick Response Codes (QR codes) A useful example of internet things includes the low cost tagging method offered by Quick Response codes. These codes can be used anywhere from newspapers, magazines, coupons, and billboards. They utilize the high resolution cameras found in modern smartphones. The…

The Always advertisement for the Ultra Thin Overnight Extra Heavy Pad does not have a website or a QR code to allow the audience to find more information. Fuchs might say that the advertisement would be more effective with a link or QR Code that connects to the Always website. Likewise, Fuchs would say that a coupon would make this advertisement more appealing. A coupon can be easily kept in a wallet or purse, allowing a simple reminder for the consumer to buy the product. According to a survey…

How destructive is the white savior complex? While the white savior complex article written by “Teju Cole” argues that many efforts by the North Americans to rescue “victims” of poverty and injustice in Africa are more about the western activist and their desire for a sentimental heroism than caring about the actual need of the African, it ultimately causes a major division between white activist and the racial other. The white savior complex is basically quite destructive trope that has been…

Pride and Prejudice is a romance novel written by Jane Austen and published in 1813. Pride and Prejudice is firstly a novel about surpassing obstacles and finding true love and happiness. The story follows the emotional development of the main character Elizabeth Bennet, one of the five daughters of Bennet family, who has the tendency to judge too quickly. As the story progress, Elizabeth learns the difference between the superficial and the essential, throughout her relationship with Mr. Darcy.…

about the theater and plays and literature... it takes you quite a while to find out whether they’re really stupid or not” (Salinger 105). Despite having directly stated that Sally Hayes is knowledgeable, he later decides that it is not good enough for her to truly be intelligent. It is odd, when considering that these areas are where much of Holden Caulfield’s expertise lie as well. Even in matters of opinion, Holden Caulfield places his own ideas as superior to those of women, even those he…

There is no doubt that Turgenev had reformist tendencies; he moved amid the circles of the Russian intelligentsia (Freeborn 1994, 39), which would have in turn born some influence on him. Since the 1860s, however, Turgenev’s work has met with criticism revolving around ideology versus poeticism, and at the center of this argument is Bazarov. In regard to this controversial character, Turgenev said, ‘in the main character, Bazarov, there lay the figure of a young provincial doctor that struck me’…

husband, he finds that the manager was not feeling concerned or pitied for his wife, rather, he was feeling pitied for himself and the writer still remembers his (ironically) incredible words. “Self-pity is essentially humourless, devoid of that lightness of touch which gives the understanding of life.” (Anthony Powell) Cronin narrates another incident that took place when a woman editor asked for lunch. She was an attractive woman enjoying a reputable place, excellent salary, well-furnished…