> For the complete documentation index, see [llms.txt](https://thisispiggy.gitbook.io/my-wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://thisispiggy.gitbook.io/my-wiki/01-step-1/cardiology/15-high-yield-ekg.md).

# 15 High Yield EKG

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/EKG%20steps/README.md)..

* P
* QRS
* Intervals
* ST

## P

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/P%20wave%20regular,%20irregular,%20none/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/fXtXB7g.jpg)

* regular: spacing between QRS same

![](https://f001.backblazeb2.com/file/wikiFiles/WCtSI5c.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/60pt0ND.jpg)

## QRS

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/QRS%20wide,%20narrow%20causes/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/wJqH9by.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/1r8Zqz8.jpg)

## Intervals

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/PR,%20QT,%20T%20abnormalities/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/Bk8oKqC.jpg)

* atheletes (high vagal tones) and beta blockers prolong PR

## ST

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/ST%20abnormalities/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/u81HFBj.jpg)

## Practice 1

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/ignore/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/koEaaAu.jpg)

* easily identifiable P
* upright P in II, III, AVF: normal sinus P
* QRS: regular
* QRS: narrow
* PR: less than 1 block
* QT: less than half 
* ST: no significant depression, elevation

![](https://f001.backblazeb2.com/file/wikiFiles/9xckZFQ.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/1k51SV4.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/k7eB6IK.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/6Ki5NFX.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/qtaMTV7.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/qe6ZU1F.jpg)

## Practice 2

![](https://f001.backblazeb2.com/file/wikiFiles/DQEzWne.jpg)

* P: upright in II, III, AVF, normal sinus P
* RR: regular QRS
* QRS: wide in V1, upright QRS in V1 RBBB
* PR: not prolonged
* QT: less than 1/2
* ST: T inversion in V1, normal in RBBB

![](https://f001.backblazeb2.com/file/wikiFiles/94Zlyx8.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/NKtmLxD.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/WbTN37M.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/fLH4CP8.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/Dn53t7F.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/IcbUrne.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/ZvU0sWv.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/8tbpvtx.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/opxWPrP.jpg)

## Practice 2

![](https://f001.backblazeb2.com/file/wikiFiles/trccUqo.jpg)

* P upright in II, III, AVF, sinus
* QRS wide, negative V1, LBBB
* peaked T and ST elevation in V1-3: common
* T inversion 1, L, V5, V6: normal in LBBB

![](https://f001.backblazeb2.com/file/wikiFiles/vvGD1TO.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/8hs5BPP.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/GCyqwyk.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/Yq3qwE8.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/6SVgZTw.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/HnTkSt1.jpg)

## Practice 4

![](https://f001.backblazeb2.com/file/wikiFiles/zzVyZhf.jpg)

* no clear P waves, afib
* irregularly irregular: QRS closer in some, farther apart in others

![](https://f001.backblazeb2.com/file/wikiFiles/7QxbqeC.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/eEYFafF.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/HOpA0a3.jpg)

## Practice 5

![](https://f001.backblazeb2.com/file/wikiFiles/lNXRJ1m.jpg)

* sawtooth, aflut

## Practice 6

![](https://f001.backblazeb2.com/file/wikiFiles/eP3fJjs.jpg)

* ventricle contracts on its own

![](https://f001.backblazeb2.com/file/wikiFiles/pf3znWo.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/whU1slg.jpg)

* buried P waves at different rate as QRS (AV dissociation)

![](https://f001.backblazeb2.com/file/wikiFiles/7nnpFDL.jpg)

![](https://f001.backblazeb2.com/file/wikiFiles/BfPzrYd.jpg)

## VFib

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/Vfib,%20torsades%20EKG/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/yoLDUAG.jpg)

* top: VFIB, cardiac arrest

## PAC, PVC

[\_](https://github.com/thisispiggy/my-wiki/tree/601ff771dc2fac1318ae8b59435ac8485628fd81/01%20Step%201/Cardiology/PAC,%20PVC%20ekg/README.md)..

![](https://f001.backblazeb2.com/file/wikiFiles/srWBTVf.jpg)

* top: early wide QRS, PVC, something stimulated ventricles to contract on its own (high catecholamines, infection, surgery)
* bottom: early narrow QRS with compensatory pause after

![](https://f001.backblazeb2.com/file/wikiFiles/uYFkQw7.jpg)