30 May 2012

heart block...

Assalamualaikum wbt...

hari ni  masa study grup kami belajar tentang ECG ..masa belajar tentang heart block kiteorang cuba nak mengingat apa finding yang akan kite jumpa dalam ECG,tetiba saya terkeluar idea ni...ni cerita rekaan semata-mata tiada kena mengena dengan yang hidup ataupun yang mati...

ade seorang budak ni nak tempat yang dihubungkan oleh sebatang sungai...dulu2 ada jambatan yang menghubungkan dua tempat tu,tapi malangnya jambatan tu dah runtuh....

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Budak ini melompat dari satu batu ke satu batu  yang timbul di permukaan sungai itu untuk sampai ke tempat sebelah.Namun kesukaran melompat menyebabkan masa untuk smpai ke tempat sebelah sana lebih lama dari biasa.
masa diambil untuk sampai ke tempat sebelah adalah prolong PR>0.12 sec


In first-degree heart block, the heart's electrical signals are slowed as they move from the atria to the ventricles (the heart's upper and lower chambers, respectively). This results in a longer, flatter line between the P and the R waves on the EKG (electrocardiogram).

First-degree heart block rarely causes any symptoms, and it usually doesn't require treatment.

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jarak antara batu2 tu makin lama makin jauh so bila dah terlampau jauh dan org tu melompat maka tanpa diduga terjatuhla dia di dalam sungai dan dibawa arus ke tebing sungai(tempat permulaan) dan dia melompat lagi dan apabila sampai tempat yang sama dia terjatuh lagi dan benda ni berulang...


interpretasi-jarak2 batu2 tu adalah PR interval become more prolonged than previous one
                -org jatuh adalah P wave without QRS complex
                -dibawa arus ke tempat permulaan adalah repetition of the sequence



In 2nd DEGREE MOBITZ TYPE 1 HB,the electrical signals are delayed more and more with each heartbeat, until the heart skips a beat. On the ECG, the PR interval gets longer and longer until the QRS waves don't follow the next P wave.
Sometimes people who have Mobitz type I feel dizzy or have other symptoms. This type of second-degree heart block is less serious than Mobitz type II.

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Dalam masa itu,ada orang lain juga ingin pergi ke tempat sebelah dan turut join melompat bersama-sama-2:1 atau 3:1 conduction block


In second-degree Mobitz type II heart block, some of the electrical signals don't reach the ventricles. However, the pattern is less regular than it is in Mobitz type I. Some signals move between the atria and ventricles normally, while others are blocked. On an ECG, the QRS wave follows the P wave at a normal speed. Sometimes, though, the QRS wave is missing (when a signal is blocked). Mobitz type II is less common than type I, but it's usually more severe. Some people who have type II need medical devices called pacemakers to maintain their heart rates.



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setelah bersusah payah cuba melompat namun masih tidak berjaya,masing2 mula putus asa dan cuba cara mereka sendiri untuk menyeberangi sungai itu..ada yang guna perahu dan ada yang guna bot laju..maka,terjadilah dissociation between P and QRS complex



In complete heart block, none of the electrical signals reach the ventricles.  When complete heart block occurs, special areas in the ventricles may create electrical signals to cause the ventricles to contract. This natural backup system is slower than the normal heart rate and isn't coordinated with the contraction of the atria. On an ECG, the normal pattern is disrupted. The P waves occur at a faster rate that isn't coordinated with the QRS waves. Complete heart block can result in sudden cardiac arrest and death. This type of heart block often requires emergency treatment. A temporary pacemaker may be used to keep the heart beating until you get a long-term pacemaker.

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menarik x cerita rekaan saya ni?hehe...ni saje je suka2 sambil mengingat kan..btw kalau nak tahu heart block ni ade beberapa type contohnya adalah:


1)AV block-1st degree
                  -2nd degree--- Mobitz type I
                                     ---Mobitz type II
                  -3rd degree(complete heart block)
2)bundle branch block-right BBB
                                  -left BBB



Sumber : http://www.nhlbi.nih.gov/health/dci/Diseases/hb/hb_types.html

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