Bidirectional visitor counter

In different programming languages[ edit ] C and other. NET languages[ edit ] Iterators in the. IEnumerator provides a MoveNext method, which advances to the next element and indicates whether the end of the collection has been reached; a Current property, to obtain the value of the element currently being pointed at; and an optional Reset method, to rewind the enumerator back to its initial position.

Bidirectional visitor counter

We have reproduced this case courtesy of Dr. Sharkawi MusaSharkawi on Twitter. A year-old man presented with sudden-onset chest pain, respiratory distress, pulmonary edema, and hypotension. This was his ECG: The Interpretation Atrial fibrillation with rapid ventricular response: The rhythm is irregularly irregular at an increased rate with no discernible P-waves.

Right bundle branch block: Probable left anterior fascicular block: The initial QRS vector is tricky to calculate here.

With that in mind, I think there is left axis deviation. How Am I So Sure? This pattern of massive anterolateral injury is associated with a proximal LAD or LMCA culprit, and characterized by a constellation of findings: Because of the large ischemic territory, these Bidirectional visitor counter are often in cardiogenic shock and look sick.

Many end up intubated and few are able to avoid vasoactive or mechanical circulatory support. The septal branches of the LAD are typically the main blood supply to the right bundle branch and left anterior fascicle, so an acute occlusion in the proximal LAD or LMCA can produce ischemia and dysfunction in those conduction pathways.

It seems counter-intuitive, but these two leads are contiguous because they examine similar areas of the myocardium for more on this, check out my giant primer on my favorite lead, The 12 Leads of Christmas: That pattern is associated with diagonal, ramus intermedius, obtuse marginal, or left circumflex artery culprits, but does not present with cardiogenic shock or bifascicular block.

There is not enough ST-elevation in the precordial leads. First, we pick out the leads in which we can most clearly see the start and end of the QRS. V1—V3 will do nicely: Next, we run a line straight down those arrows to make sure they align. Since the QRS morphology is uniform across most of the rhythm, we can use the same start and end points in different complexes… Then, we extend those lines up to identify the beginning and end of the QRS in the trickier leads… Now we can see where there is ST-elevation or depression: What we consider the electrocardiographic posterior wall is really the lateral free wall of the heart.

I have lots more on that in The 12 Leads of Christmas: With left main coronary artery LMCA occlusion, those forces sometimes balance out. We can approximate this view of the heart with a short-axis cross-section as seen in the parasternal short-axis echocardiographic window: During a STEMI, injury vectors are directed from the subendocardiun towards the subepicardial myocardium of the ischemic regions.

This is just a fancy way of saying that the ST-elevation points outwards, towards the surface of the injured muscle. When two vectors of the same magnitude point in opposite directions, they cancel each-other out.

Again, during a STEMI, the injury vectors point from the subendocardium to the subepicardium in other words, from the inside-out. Hopefully you recall the hexaxial reference system from early in your ECG training. Since that means the ST-elevation is pointing away from those inferior leads, we should see ST-depression in them.

The ST-depression should be maximal in lead III since the injury vector is pointing directly away from it.

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Likewise, the injury vector points towards aVL and lead I, so we expect to see ST-elevation in those leads. There will be more ST-elevation in aVL than lead I because it is closer to the direction the arrow is pointing.

As a result, we expect an isoelectric J-point in that lead with no ST-elevation or depression.Rex Research was established in by Robert A.

Bidirectional visitor counter

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We all are quite familiar with voting machines, even we have covered few other electronic voting machine projects previously using RFID and AVR microcontroller.

In this project, we have used the arduino controller to create an electronic voting machine. A Bidirectional Visitor Counter using AVR ATmega16; A Bidirectional Visitor Counter using AVR ATmega Share.

Share. Tweet. It is bidirectional, that means if a person enter the room, it will increment the count and if a person leaves the room then it will decrement the counter. The count is displayed in a 3 digit seven segment display. is tracked by us since December, Over the time it has been ranked as high as 35 in the world, while most of its traffic comes from USA, where it reached as high as 18 position. Here is information I have generated for few of the many electrical / electronics topics I have found useful.

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