A nurse is caring for a client who is exhibiting manifestations of syndrome of inappropriate antidiuretic hormone (SIADH). Which of the following findings should the nurse report to the provider? (Select all that apply.)

A. Complete Heart Block: Complete heart block (third-degree AV block) occurs when there is no communication between the atria and ventricles. The atria and ventricles beat independently, resulting in a very slow ventricular rate. This rhythm is characterized by regular P waves that have no relation to the QRS complexes.

B. Sinus Tachycardia: Sinus tachycardia is a rhythm originating from the sinoatrial node with a heart rate typically between 100-150 beats per minute. The rhythm is regular, and the P waves precede each QRS complex consistently.

C. Ventricular Tachycardia: Ventricular tachycardia is a fast heart rhythm that originates from the ventricles. It is characterized by wide and abnormal QRS complexes with a rate usually between 150-250 beats per minute. There may be no visible P waves, and if present, they are not associated with the QRS complexes.

D. Idioventricular Rhythm: Idioventricular rhythm is a slow rhythm originating from the ventricles with a heart rate usually between 20-40 beats per minute. It has wide and abnormal QRS complexes and no visible P waves.

Condition Most Likely Experiencing: Heart failure.

The client presents with signs and symptoms consistent with heart failure, including cardiomegaly, bibasilar pleural congestion on chest x-ray, elevated BNP level, and vital signs indicating hypertension (BP 146/98 mm Hg), tachycardia (pulse rate 106/min), and tachypnea (respirations 24/min). Additionally, the client is prescribed medications commonly used to manage heart failure, such as digoxin and carvedilol, and is receiving a diuretic (furosemide) to address fluid overload associated with heart failure.
Action to Take:

Elevate the head of the bed: Elevating the head of the bed helps reduce venous return to the heart, decreasing preload and potentially alleviating symptoms of heart failure, such as dyspnea and orthopnea. It can also help prevent aspiration in clients with compromised cardiac function. Encourage intake of a low-sodium diet: A low-sodium diet is essential in managing heart failure as it helps reduce fluid retention and edema by decreasing fluid volume overload. Sodium restriction helps minimize fluid accumulation, which is crucial in preventing exacerbations of heart failure.
Parameter to Monitor:

Urinary output: Monitoring urinary output is important in assessing fluid balance and response to diuretic therapy in clients with heart failure. Decreased urinary output may indicate worsening heart failure or inadequate response to diuretic therapy, whereas increased output may suggest over-diuresis or improvement in heart failure symptoms.
Blood pressure: Monitoring blood pressure helps assess the effectiveness of treatment in managing heart failure and controlling hypertension, a common comorbidity. Hypertension can exacerbate heart failure, so monitoring blood pressure trends helps guide adjustments in medication therapy to achieve optimal blood pressure control and improve cardiac function.