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NemiM [27]
3 years ago
14

You are presented with a stack of ECGs on your first day of your cardiology rotation and are given a instruction: "Read them." A

s you progress through the pile, you note the following abnormalities. Explain from where in the heart or cardiac conduction system each abnormality might have come: a. Absent P waves b. Abnormally long QRS complex c. Abnormally long P-R interval d. Extra QRS complexes
Medicine
2 answers:
miv72 [106K]3 years ago
7 0

Answer:

a. Absent p wave is present in atrial fibrillation.

b. Abnormally long QRS complex is present in right or left bundle branch block.

c. Abnormally long PR interval is present in first degree heart block.

d. extra QRS complexes are present in abnormal pacemaker or abnormal conducted beat.

Explanation:

By reading the ECGS we can fine a number of abnormalities by simply locating problems in P, QRS, T waves, PR intervals and ST segments.

Absent P wave in an ECG represents Atrial fibrillation or sinoatrial arrest. Atrial fibrillation is an abnormal heart rhythm  also know as arrhythmia characterized by rapid and irregular beating of the atrial chambers of the heart.

Abnormally long QRS complex represents Right or left bundle branch block, hyperkalemia, drug induced or abnormal ventricular rhythm.

Abnormally long PR interval represents heart block. The PR interval reflects impulse conduction from the atria to the ventricles is normal. A long PR interval  indicates a slowing of conduction between the atria and ventricles, usually due to slow conduction through the atrioventricular node (AV node). This is known as first degree heart block.

Extra QRS complexes represents abnormal pacemaker conductivity.

4vir4ik [10]3 years ago
6 0

Answer: The question is not arranged well,below is the correct arrangement;

You are presented with a stack of ECGs on your first day of your cardiology rotation and are given a instruction: "Read them." As you progress through the pile, you note the following abnormalities. Explain from where in the heart or cardiac conduction system each abnormality might have come;

a. Absent p waves

a. Abnormally long QRS complex

b. Abnormally long P-R interval

c. Extra QRS complexes.

Explanation: This indicated a problem in the sinoatrial node, as it is not generating the depolarization that spreads through the atria to lead to the P wave.

An ECG ( electrocardiogram) is a test that measures the electrical activity of the heart to show whether the heart is working normally or not.

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Savatey [412]

Answer:

14.8% of H2O2

Explanation:

Based on the redox reaction of H2O2/MnO4- is:

2MnO4- + 5H2O2 + 6H+ ⇄ 2Mn2+ + 5O2 + 8H2O

<em>2 moles of KMnO4 react with 5 moles of H2O2</em>

<em />

To solve this question we need to find the moles of KMnO4 until reach the endpoint. Using the balanced reaction, we can find the moles of H2O2 that must be converted to grams using its molar mass -Molar mass H2O2: 34.015g/mol-:

<em>Moles KMnO4:</em>

0.0297L * (1.4686eq/L) = 0.04362eq MnO4- * (1mol / 5eq) = 0.008723 moles MnO4-

<em>Moles H2O2:</em>

0.008723 moles MnO4- * (5mol H2O2 / 2mol MnO4-) = 0.02181 moles H2O2

<em>Mass H2O2:</em>

0.02181 moles H2O2 * (34.015g/mol) = 0.7418g H2O2

<em>%:</em>

0.7418g H2O2 / 5.0mL * 100

<h3>14.8% of H2O2</h3>
4 0
3 years ago
The nurse is preparing to administer 80 mg of methylprednisolone intravenously (IV) to a client with pneumonia. The vial states
schepotkina [342]

The nurse would correctly draw up 1.3 mL.

<h3>What is methylprednisolone?</h3>

Methylprednisolone is used to treat illnesses of the skin, kidneys, lungs, eyes, blood, renal and intestinal abnormalities, severe allergic responses, arthritis, blood disorders, immune system issues, some malignancies, and eye ailments. It lessens the immune system's reactivity to certain illnesses in order to lessen symptoms including pain, swelling, and allergic-like responses. A corticosteroid hormone is included in this drug. In cases of hormone abnormalities, methylprednisolone may potentially be used with other drugs.

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Similar to prednisone, methylprednisolone can also be administered intravenously (IV) at greater dosages to treat severe inflammation. The use of IV methylprednisolone in illnesses like lupus that affects the kidneys or brain as well as some forms of vasculitis is an example.

<h3>Given: </h3>

Desired dose : 80 mg

Quantity on hand : 2 mL

Dose on hand : 120 g

Desired quantity = ?

<h3>Formula used : </h3>

\frac{Dose on hand }{Quantity on hand } = \frac{Dose desired}{Quantity desired}

<h3>Solution : </h3>

120 g / 2 mL = 80 g / Quantity desired

= > Quantity desired =  2 x 80 / 120  mL

= > Quantity desired = 1.33 mL ≈ 1.3mL  

Therefore, quantity of methylprednisolone intravenously (IV) drawn by the nurse is 1.3 mL .

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8 0
1 year ago
A man awakens after eight hours of normal sleep and has an unbroken snap gauge band. There is a good chance that the man has a:
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A man wakes up after eight hours of normal sleep and has an unbroken range of his blood pressure gauge. There is a good chance that the man has no sleep disturbances.

<h3>Snap*Gauge® </h3>

Snap*Gauge® is a non-prescription device used by the patient during sleep to determine if a patient breaks pre-set snap-gauges with different release-force constants. The number of brands broken will indicate the intensity of the patient's nighttime erections.

With this information, we can conclude that a man wakes up after eight hours of normal sleep and has an unbroken range of his blood pressure gauge. There is a good chance that the man has no sleep disturbances.

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Answer:

The correct answer is option D. give furosemide.

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Digoxin toxicity may occur due to the low level of potassium (inside the cell)due to the inhibitaion of the sodium-potassium pump.  Furosemide is a diuretic drug that decreases salt concentration (such as ions) in the body by increasing urine output. and causes a low level of potassium in the body

Thus, furosemide increases digoxin toxicity as during low levels of potassium, digoxin can easily bind with the sodium-potassium pump and shows severe effects.

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If a child has been diagnosed as having failure to thrive then the nurse should use half-strength formula when feeding the infant.

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A child is said to suffer from failure to thrive when the child is unable to gain weight in a manner tat is commensurate with those of his mates of the same age or sex.

If a child has been diagnosed as having failure to thrive then the nurse should use half-strength formula when feeding the infant.

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7 0
2 years ago
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