The nurse understands that sinus tachycardia differs from normal sinus rhythm because:

the heart rate is greater than 100 bpm in sinus tachycardia

more p waves are present than QRS complexes

the QRS complexes measure greater than 0.10

the rhythm is often irregular in sinus tachycardia

Answer and Explanation

The Correct Answer is A

A. the heart rate is greater than 100 bpm in sinus tachycardia: Normal Sinus Rhythm is characterized by a heart rate between 60 and 100 beats per minute (bpm). Sinus tachycardia is defined as a sinus rhythm with a heart rate exceeding 100 beats per minute. The rhythm remains regular, with each P wave followed by a QRS complex, but the rate is significantly faster than normal sinus rhythm.

B. more p waves are present than QRS complexes: In sinus tachycardia, the number of P waves and QRS complexes remains one-to-one, as each atrial impulse continues to be conducted to the ventricles. More P waves than QRS complexes typically suggest atrial flutter or other forms of AV dissociation.

C. the QRS complexes measure greater than 0.10: A widened QRS complex suggests a bundle branch block or ventricular rhythm, not sinus tachycardia. In sinus tachycardia, QRS complexes typically remain narrow, measuring less than 0.10 seconds unless an intraventricular conduction delay is present.

D. the rhythm is often irregular in sinus tachycardia: Sinus tachycardia is usually a regular rhythm with consistent R-R intervals. An irregular rhythm is more indicative of atrial fibrillation or sinus arrhythmia, not a defining characteristic of sinus tachycardia.

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Correct Answer is A

Explanation

A. Benign Prostatic Hyperplasia: Tamsulosin is an alpha-1 adrenergic blocker specifically prescribed to relieve urinary symptoms caused by benign prostatic hyperplasia (BPH). It works by relaxing the smooth muscles in the bladder neck and prostate, improving urine flow and decreasing bladder outlet obstruction.

B. Congestive Heart Failure: Tamsulosin is not indicated for heart failure management. Medications used in heart failure typically include ACE inhibitors, beta blockers, diuretics, and aldosterone antagonists not selective alpha-1 blockers like tamsulosin.

C. Rheumatic Fever: Rheumatic fever is linked to valvular heart disease, not urinary retention or prostate enlargement. Tamsulosin does not have a role in its treatment or management.

D. Coronary Artery Disease: Tamsulosin does not have any therapeutic effect in managing coronary artery disease. CAD is typically managed with medications such as beta blockers, statins, antiplatelets, and nitrates, depending on the clinical scenario.

A. The TEE evaluates if emboli are present if cardioversion is required B. The study will use electric current to stop the abnormal conduction pathway C. A TEE will help restore the client's underlying baseline normal rhythm, D. A TEE is required prior to implantable defibrillator placement in clients with atrial fibrillation

Correct Answer is A

Explanation

A. The TEE evaluates if emboli are present if cardioversion is required: A transesophageal echocardiogram (TEE) provides detailed imaging of the heart’s chambers, particularly the left atrium and left atrial appendage, where clots often form in atrial fibrillation. It is used to rule out thrombi before cardioversion to reduce the risk of stroke during the procedure.

B. The study will use electric current to stop the abnormal conduction pathway: This describes electrical cardioversion, not TEE. TEE is a diagnostic imaging procedure and does not involve the delivery of electrical currents to modify the heart's rhythm or conduction.

C. A TEE will help restore the client's underlying baseline normal rhythm: TEE does not treat arrhythmias. Its role is diagnostic—to visualize cardiac structures, not to restore normal rhythm. Cardioversion or pharmacologic agents are required to correct atrial fibrillation.

D. A TEE is required prior to implantable defibrillator placement in clients with atrial fibrillation: TEE is not routinely required before implantable cardioverter-defibrillator (ICD) placement. ICD decisions are usually based on ejection fraction, rhythm stability, and risk of sudden cardiac arrest, not the presence or absence of atrial thrombi.

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The nurse understands that sinus tachycardia differs from normal sinus rhythm because:

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Correct Answer is A

Explanation

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Correct Answer is A

Explanation

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