What is this connection between the heart and kidneys? Let's learn about Cardiorenal Syndrome!

The heart and kidneys are two organs in our body that work like best friends. If there is a problem with one, the other also feels it and is affected. Sometimes these problems can come on very quickly, and other times they increase over time. That is the problem between the heart and kidneys that we are talking about today , ``Cardiorenal Syndrome`` .

What is Cardiorenal Syndrome? Why does this happen?

Simply put, `(Cardiorenal Syndrome)` is a condition in which a weakness in your heart or kidneys affects the functioning of other organs. Think about it, our heart is the one that pumps blood throughout the body. The kidneys clean that blood and remove unnecessary waste products as urine. Not only that, but controlling the amount of salt and water in the body is also a major role of the kidneys. This is what controls our blood pressure and determines how much fluid the body retains.

Now, what happens if the heart becomes weak? It doesn't pump blood properly to the body. Then the amount of blood that the kidneys receive also decreases. If the kidneys don't work properly, waste products accumulate in the body, and salt water stays inside the body instead of going out. This again puts a strain on the heart. This is a complex process that is interconnected like that. Sometimes things like ``Reduced blood flow to kidneys``, increased pressure in the large veins that bring blood to the heart (`vena cava``), and decreased pumping ability of the heart (low ``cardiac output`` or ``(heart failure)`` ) can affect this.

How common is this condition?

In fact, it is more common than you might think to have problems with both the heart and kidneys at the same time. About 64 million people in the world suffer from a condition called ``Heart failure'' . Doctors have found that between 45% and 63% of these people with chronic heart failure also have kidney disease. Sometimes it is difficult to determine exactly whether the problem came first with the heart or the kidneys.

What are the symptoms of Cardiorenal Syndrome?

In this situation, you may experience symptoms like these. But remember, having these symptoms does not mean you have this disease. But it is important to be aware of them.

• Feeling of constant fatigue (`Fatigue`): A feeling of being tired, like you don't have the energy to do anything.
• Shortness of breath : Feeling short of breath even when walking a little or climbing a few stairs.
• Low urine output: If you feel like you are urinating less during the day.
• Depression : Just feeling sad, like you're feeling down.
• Swelling of the legs and abdomen : The legs, ankles, and sometimes the abdomen feel swollen. As if they are filled with water.
• Feeling confused (`Confusion`): It feels like it's hard to concentrate, like things are getting mixed up.
• Feeling a change in heart rhythm : Feeling like your heart is suddenly beating faster, or skipping a beat.

What are the causes of Cardiorenal Syndrome?

There can be many reasons for this. Some are heart-related problems, some are kidney-related problems, and some are conditions that affect the entire body.

• Cardiogenic shock : A sudden shock to the heart.
• `(Heart failure)` : Weakening of the functioning of the heart.
• `(Acute coronary syndrome)` : An emergency condition caused by blockage of the blood vessels supplying the heart.
• Heart surgery complications.
• Heart valve disease.
• Vasculitis : An inflammatory condition that occurs in the blood vessels.
• Atherosclerosis : Thinning and hardening of the arteries.
• Pulmonary embolism (PE) : A blood clot that blocks a blood vessel in the lungs.
• Kidney disease or injury.
• Sepsis : A severe infection that spreads throughout the body.
• Lupus : A disease caused by a problem with the immune system.
• Sarcoidosis : A disease in which small granulomas form in various parts of the body.
• Diabetes .
• Electrolyte imbalances in the body ( electrolyte disorders) .

Who is most at risk for this?

Some people are more likely to develop this condition (Cardiorenal Syndrome) . This means that people with these risk factors need to be a little more careful.

• For those with diabetes .
• For those with high blood pressure .
• For people with a body mass index (BMI) of over 30 (i.e. obese).
• For those with vascular disorders.
• For those who already have kidney disease .
• For those who already have heart failure .

What are the possible complications of Cardiorenal Syndrome?

If this condition is not treated properly, it can lead to more problems. That means the condition can get worse.

• Cardiogenic shock may occur.
• Kidney disease can get worse (`Worsening kidney disease`).
• Atherosclerosis (narrowing of the arteries) may increase.
• Inflammation can occur in the body.

How is this disease (Cardiorenal Syndrome) diagnosed?

There is no single "gold standard" test to diagnose this condition. A doctor will examine you and assess the amount of fluid in your heart, lungs, abdomen, legs, and blood vessels. In addition, some tests may be ordered.

The tests that can be done for this are:

• Blood tests : Check kidney function and heart damage.
• Urinalysis : Checks for protein and blood in the urine.
• Echocardiogram (Echo): A scan to check the function, size, and condition of the heart valves.
• Ultrasound scan of your kidneys and/or chest : Check the condition of these organs.
• `(Right heart catheterization)` : A test that measures the pressure in the right side of the heart.
• Chest X -ray: To see if there is fluid in the lungs or if the heart is enlarged.

Are there any types of Cardiorenal Syndrome?

Yes, doctors classify this condition. It depends on which organ the problem first started in and how long ago. Once you understand this, it becomes easier to treat.

There are 5 main types:

• Type 1: Heart failure occurs suddenly. This causes damage to the kidneys and their function to fail. This is an `acute` condition.
• Type 2: Chronic heart problems gradually damage the kidneys over time.
• Type 3: Acute kidney injury (AKI) causes acute heart failure.
• Type 4: Chronic kidney disease causes heart problems over time. For example, heart rhythm disorders, heart failure , or coronary artery disease (CAD) .
• Type 5: A condition that affects the entire body, causing both the heart and kidneys to fail.

How is this treated?

The main goal of treating Cardiorenal Syndrome is to maintain normal blood and fluid levels in your body. This is because when your heart is weak (heart failure), excess fluid can build up in your body. The kidneys are responsible for removing this excess fluid. So when both your heart and kidneys are affected at the same time, it can be challenging to maintain this balance.

There are many treatment options, ranging from medications to devices and organ transplants:

• Diuretics : Medicines that help the body eliminate excess water as urine.
• Beta-blockers : Control heart rate and reduce the workload on the heart.
• ACE inhibitors : Help control blood pressure.
• ARBs : This is also a type of medication that controls blood pressure.
• ARNI (angiotensin receptor/neprilysin inhibitors): A modern type of medication that improves heart function.
• Renin angiotensin system blockers : Block this system, reducing blood pressure and kidney damage.
• Mineralocorticoid receptor antagonists : help maintain salt and water balance in the body.
• Inotropes : Drugs that increase the force of heart contractions. These are usually given during hospitalization.
• Ultrafiltration or dialysis : A method of purifying the blood using a machine when the kidneys are not working properly.
• Implantable cardioverter defibrillator (ICD ): A small device placed under the skin of the chest to stop dangerous heart rhythm irregularities.
• Left ventricular assist device (LVAD): A mechanical pump that helps people whose heart's pumping ability is very weak.
• Cardiac resynchronization therapy (CRT) : It is like a pacemaker that helps the heart's chambers beat together.
• Heart transplant .
• Kidney transplant .

Are there any side effects of the treatment?

Yes, like all treatments, some side effects may occur with these treatments for ``Cardiorenal Syndrome.`` However, not all of these occur in everyone.

• Headache.
• Dizziness.
• Fatigue.
• Frequent urination (especially when taking diuretics ).
• Slow heart rate.
• High potassium levels in the blood.
• Kidney injury (due to some medications).
• Device malfunction.
• Infection or bleeding after a device is inserted or after an organ transplant.
• Kidney disease.
• Organ rejection.

It's best to talk to your doctor before you worry about these side effects. That way, you can understand exactly what's possible and what to do about them.

What can someone with Cardiorenal Syndrome expect?

It is very important to identify this condition early. Then, with the right treatment at the right time, you can maintain your quality of life to a certain extent. However, to be honest, the prognosis or outlook for the patient with `(Cardiorenal Syndrome)` is usually not that good. This means that the disease can be a little more severe. In such cases, a treatment method called ` Palliative care` can be very helpful. This is done by controlling the symptoms, making the patient comfortable, and reducing frequent hospitalizations.

How can I reduce this risk?

By controlling certain things, you can reduce your risk of developing Cardiorenal Syndrome .

• If you have diabetes , control it well.
• If you have coronary artery disease , get it treated properly.
• If you have high blood pressure , control it.
• If your body mass index (BMI) is over 30 , try to lose weight.

It is very important to take the correct medication for these conditions, in the correct dose. Because some medications can also affect kidney function if taken incorrectly.

I have Cardiorenal Syndrome, how can I take care of myself?

If you have this condition, it is very important to take care of these things:

• Follow your doctor's treatment plan exactly. Take your medications on time and as directed.
• If you develop any new symptoms, or if an existing symptom worsens, tell your doctor immediately.
• Be sure to go to the doctor on scheduled appointments.

When should I go to a hospital (ETU) immediately?

If you have these symptoms, it is very important to seek medical advice immediately. Go to a hospital as soon as possible.

• If you are not producing urine .
• If you can't catch your breath.

What questions should I ask my doctor?

When you see your doctor, don't be afraid to ask questions you have. You can ask things like:

• What treatment method is best for me?
• Can I treat it with medication alone?
• Are there support groups for people with Cardiorenal Syndrome ?
• How serious is my condition?

Finally, what to remember (Take-Home Message)

Cardiorenal Syndrome is a complex condition. It is a condition in which three of the body's most important organs – the heart and the kidneys – stop working properly. Therefore, if you have this condition, following your doctor's instructions exactly is the best way to get the best results. Informing your loved ones about your wishes will give you peace of mind. If your condition suddenly worsens, having a living will written while you are still alive can help your family decide what care you need.

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