Premature Ventricular Contractions (PVCs): Symptoms, Causes and Treatment

Premature ventricular contractions are electrical rhythm disturbances originating from the lower chambers of the heart, known as the ventricles, causing the heart to beat prematurely outside its normal rhythm. Also referred to in medical literature as ventricular premature beats or extrasystoles, this condition is one of the most common abnormalities encountered in childhood with complaints of heart palpitations. These premature electrical impulses, which disrupt the heart’s normal rhythm, create a brief pause and sensation of a skipped beat immediately after the contraction. Frequently evaluated in pediatric cardiology practice, these rhythm irregularities arise from momentary differences developing at the cellular level within the heart and can be managed safely with the appropriate clinical approach.

Why Do Premature Ventricular Contractions in Children Differ from Those in Adults?

The frequency of extra heartbeats encountered in the pediatric age group differs greatly from that seen in adult patients. As adults age, the cellular structure of their hearts changes, and therefore twenty-four-hour rhythm monitoring may detect premature beats in rates ranging from forty percent to as high as seventy-five percent. An increase in these electrical irregularities with advancing age is considered an expected finding in adults. However, the picture is entirely different when healthy young populations are examined. While this rate is below one percent in individuals under the age of twenty, it is evident that this rhythm disturbance cannot be regarded as being as ordinary in children as it is in adults.

Even within childhood itself, significant differences are observed according to age groups. For example, in children younger than ten years of age, benign rhythm disturbances originating from the upper chambers of the heart are seen more frequently, whereas premature ventricular contractions originating from the lower chambers are much rarer. Statistically, the rarity of this condition in young children makes a detailed evaluation mandatory for children presenting with this complaint. For this reason, every extra heartbeat detected in young children is taken very seriously, and our goal is to determine with certainty whether an underlying structural problem is present.

What Changes in the Heart’s Electrical System Cause Premature Ventricular Contractions (Premature Beats)?

Every heartbeat is controlled by an extremely complex yet remarkably perfect electrical network within the heart.

If we compare the heart to a house, the main electrical switch is located in the upper right chamber of the heart, and the electrical current spreads from there through wiring to all the chambers in sequence. One of the primary cellular processes responsible for premature beats is that certain mischievous cells in the lower chambers (ventricles) begin acting independently of the main electrical switch. These cells essentially declare themselves leaders and start generating extra electrical impulses completely independently of the heart’s natural rhythm center.

Another mechanism involves excessive sensitivity and overstimulation of cardiac tissues due to imbalances in intracellular electrolytes such as calcium, potassium, and magnesium. Sometimes, an electrical impulse becomes trapped in a small scar or an abnormal area within the heart, creating a continuous loop that repeatedly stimulates the same region. Current scientific studies investigating the causes of these cellular changes show that metabolic inflammation, in other words hidden inflammatory processes within the body, plays a significant role. It is now better understood that certain cellular waste products increasing in the bloodstream may disrupt the heart muscle’s conduction pathways and trigger these abnormal beats. Understanding these cellular mechanisms provides valuable guidance in our approach to children.

Which Underlying Diseases Trigger the Development of Premature Ventricular Contractions in Children?

The vast majority of premature ventricular contractions encountered in children occur in completely healthy children who have no structural abnormalities of the heart. The hearts of children in this group are structurally normal, and this rhythm disturbance is referred to as “idiopathic,” meaning benign. There is no life-threatening risk in this benign group. The most important and essential step in the clinical approach is distinguishing this harmless group from children who have an actual heart disease.

The secondary potentially dangerous causes we investigate during clinical evaluation include:

• Rheumatic carditis
• Viral myocarditis
• Congenital heart abnormalities
• Scars from previous heart surgery
• Cardiac tumors

Immune system diseases

To explain these causes in more detail, conditions such as acute rheumatic fever or myocarditis (inflammation of the heart muscle) developing after severe viral infections profoundly disrupt the heart’s electrical stability. When the heart muscle becomes inflamed, communication between cells is impaired, and the ventricles begin producing chaotic abnormal signals. In children who have previously undergone surgery for congenital heart disease, surgical suture lines within the heart create an ideal environment for electrical impulses to become trapped in reentrant circuits. Although tumors originating from the heart tissue itself are extremely rare during childhood, some persistent rhythm disturbances may be caused by cellular masses. Structures known as fibromas, in particular, do not tend to shrink spontaneously and may infiltrate the heart muscle, creating continuous electrical chaos. Temporary rhythm disturbances may also occur when the tip of umbilical catheters placed in newborn intensive care units comes too close to the heart, although this condition generally resolves quickly once the catheter is removed.

How Do Children Experience the Symptoms of Premature Ventricular Contractions and What Are the Warning Signs?

Most children with these extra electrical beats experience no symptoms at all and continue their daily lives completely normally. The rhythm irregularity is often discovered incidentally during a routine examination performed for a simple febrile illness or before obtaining a sports participation certificate. However, among children who do perceive the condition, the most common complaint is a strong sensation of palpitations, fluttering like bird wings, or a sudden pause accompanied by a brief sensation of breathlessness.

The physiological basis of these symptoms is quite interesting. Beats originating from the ventricles are felt much more strongly, but the child usually does not feel the abnormal premature beat itself. Immediately after the abnormal beat, the heart takes a brief compensatory pause to restore its rhythm. During this short resting period, the chambers of the heart fill with much more blood than usual. When the first normal electrical signal arrives after the pause and the heart contracts, this large volume of blood is pumped forcefully throughout the body. The sensation perceived as a thump, skipped beat, or jump in the chest is actually this first powerful contraction of the overfilled heart.

Warning signs that should alert both families and physicians include:

• Fainting
• Dizziness or blackout
• Severe chest pain
• Feeling unwell during exercise
• Palpitations
• Unexplained excessive fatigue
• Cold sweating

The development of fainting (syncope), particularly in a child with premature ventricular contractions, is a very serious warning sign. It may indicate a genetic problem involving the heart’s electrical channels, dangerous thickening of the heart muscle, or episodes in which the rhythm suddenly reaches life-threatening levels. In addition, if these abnormal beats constitute a large proportion of the total daily heartbeats, the heart muscle may gradually become fatigued, lose pumping strength, and enlarge over time. Recognizing these warning signs before reaching this stage is extremely important.

Which Tests Are Used to Reach the Correct Diagnosis of Premature Ventricular Contractions?

Every step taken during the diagnostic process is designed to gradually uncover the secrets hidden within the heart. This journey begins by carefully listening to the child’s and the family’s complaints. Just like a detective, the physician investigates when the palpitations started, whether they increase with exercise, and whether there is any family history of sudden cardiac death. During the physical examination, the heart sounds are listened to with a stethoscope, and the heart valves are evaluated for possible abnormalities.

The main diagnostic tests we use include:

• Electrocardiography
• Echocardiography
• Holter rhythm monitoring
• Exercise stress testing
• Electrophysiological study
• Cardiac MRI (when necessary)
• Genetic testing (when necessary)

Electrocardiography (ECG) is the indispensable gold standard for diagnosis. Small adhesive electrodes attached to the chest, arms, and legs record the heart’s electrical activity on paper, allowing us to determine where the abnormal beat originates by analyzing the width of the electrical waves. Echocardiography is the ultrasound examination of the heart. Using sound waves, all heart chambers, wall thicknesses, pumping strength, and valves are visualized in color and motion, allowing structural problems such as holes or tumors to be completely ruled out.

Holter rhythm monitoring forms the backbone of the diagnostic process. Electrodes attached to the child’s chest are connected to a device about the size of a mobile phone, which the child wears while sleeping, playing, and attending school for twenty-four hours. This allows the exact proportion of abnormal beats among hundreds of thousands of daily heartbeats—the “ectopic burden”—to be calculated. Exercise stress testing evaluates the heart’s response to physical stress. While the child runs on a treadmill, an ECG is continuously recorded. If the premature beats disappear during exercise in a child with a normal echocardiogram, this provides great reassurance because it demonstrates that the heart is healthy and the condition is benign. In high-risk children with unexplained fainting despite these evaluations, an electrophysiological study is performed by advancing thin wires into the heart through the groin vessels to create a detailed map of the heart’s electrical system.

How Is Risk Stratification Performed in Children Diagnosed with Premature Ventricular Contractions?

Once the evaluation process is completed, each child is classified into a specific clinical risk category based on the findings. This classification is the most critical stage in determining how the child’s daily life will be managed and whether treatment is necessary. Every child’s heart tells a different story, and our responsibility is to categorize that story as accurately as possible.

The first group consists of low-risk, benign cases. These children have structurally normal hearts. Children whose premature beats disappear during exercise, whose daily burden of abnormal beats is low, and who have no history of fainting belong to this group. These children should not be regarded as having heart disease but simply require periodic follow-up. The intermediate-risk group includes children whose hearts are structurally normal but who experience symptoms such as palpitations, fatigue, and chest pain that significantly reduce their quality of life. These children generally have a somewhat higher daily ectopic burden and are followed more closely to improve their daily well-being.

The situation changes entirely in the high-risk group. This group includes children with congenital heart disease, previous surgical scars in the heart, or rhythm disturbances that worsen to dangerous levels during exercise. Children with a family history of unexplained sudden cardiac disease at a young age or those who have experienced fainting episodes require much closer follow-up. Patients with a very high daily ectopic burden are directed toward treatment protocols and, when necessary, advanced interventional procedures to prevent serious outcomes.

Which Lifestyle Changes Are Recommended in Benign Cases of Premature Ventricular Contractions?

Medical treatment is definitely not recommended for low-risk, benign cases with structurally normal hearts. The most important intervention is reassuring both the child and the family psychologically. Parents who hear that their child has a heart rhythm abnormality often experience significant panic and anxiety. They may develop an intense and unfounded fear that their child could suddenly die. At this stage, it is essential to explain in detail how benign the condition is and to prevent the child from being treated as if they were seriously ill. Providing psychological support helps prevent the child from constantly focusing on their heartbeat and increasing their anxiety.

Adjusting dietary habits and daily routines is remarkably effective in controlling symptoms. Stimulant-containing foods unnecessarily activate the heart’s electrical system and may trigger these abnormal beats.

The following should be reduced or eliminated from the diet:

• Tea
• Coffee
• Energy drinks
• Carbonated soft drinks
• Large amounts of chocolate
• Sympathomimetic cold medications

Regular and adequate sleep is one of the best medicines for the heart. Imposing physical restrictions is actually one of the greatest mistakes that can be made. Regular walks and non-strenuous sports activities should be encouraged because physical activity helps regulate stress hormones and supports a normal heart rhythm. Allowing children to play freely in environments where they can expend their energy and enjoy themselves is, in fact, one of the most natural treatments for these benign rhythm disturbances.

How Are Medical Treatment and Emergency Management Planned for Premature Ventricular Contractions?

Medical treatment is initiated when the child’s symptoms begin to interfere with quality of life or when Holter monitoring shows that the daily burden of abnormal beats has reached potentially concerning levels. The first choice for daily oral treatment consists of medications that slow the heart rate and regulate the strength of cardiac contractions. These medications calm the heart and are highly effective in relieving the strong thumping sensation and palpitations experienced by the child. However, it should be understood that these tablets are not miraculous treatments that permanently eliminate the rhythm disorder; they simply maintain electrical stability while they are being used. In more resistant pediatric cases involving serious underlying diseases, stronger antiarrhythmic medications that complement one another may need to be used together.

Sometimes, however, the situation does not remain this stable, and emergency department visits become unavoidable. Medical teams are always prepared for situations in which the heart’s electrical system becomes completely uncontrolled and dangerous episodes of tachycardia occur repeatedly.

Critical situations requiring emergency care include:

• Altered consciousness
• Bluish discoloration of the lips
• Shortness of breath
• Dizziness or blackout
• Cold sweating
• Weak, barely palpable pulse

If the child arrives at the emergency department with normal blood pressure and is fully conscious, medications that slow the heart’s electrical channels are administered intravenously, and the rhythm is expected to return to normal within minutes. If the child has low blood pressure, shock, or impaired consciousness, there is absolutely no time to wait for medications to take effect. In this situation, the child is given light sedation, and synchronized electrical cardioversion is performed to reset the heart’s primary electrical generator and restore normal rhythm. In chaotic rhythm disturbances where the heart has effectively stopped functioning, high-energy shocks are delivered immediately using a defibrillator, and uninterrupted cardiopulmonary resuscitation is initiated as part of life-saving protocols.

What Is Catheter Ablation in the Treatment of Premature Ventricular Contractions and When Is It Performed?

Catheter ablation is currently the most advanced interventional treatment for rhythm disorders because it not only suppresses symptoms but also eliminates the source of the problem and offers a definitive cure. If premature ventricular contractions account for more than ten percent of a child’s total heartbeats, reach tens of thousands per day, and this excessive burden causes the heart to become fatigued and lose pumping function, ablation is no longer simply an option but a necessity. It is also an excellent solution for children who do not wish to take medications for years or who continue to experience palpitations despite medical therapy.

The procedure is performed in specially designed electrophysiology laboratories while the child is lightly sedated or under general anesthesia. Extremely thin, flexible catheters approximately the thickness of spaghetti are inserted through the large vein in the groin and gently advanced into the heart. Using advanced three-dimensional mapping systems, the exact origin of the abnormal beats is identified with millimetric precision.

Once the abnormal focus has been identified, it is eliminated using one of two methods. The first involves applying radiofrequency energy to destroy the small area with heat. The second method, particularly preferred in children for areas located close to the heart’s normal conduction pathways, uses cryoablation. Extremely cold energy freezes the abnormal cells, permanently eliminating their activity. Because cryoablation minimizes the risk of permanently damaging the heart’s primary conduction system, it is considered a very safe option in children. Shortly after the procedure, the child stands up with a fully restored heart rhythm.

Which Sports Can Children with Pacemakers and a History of Premature Ventricular Contractions Participate In?

In the past, children with heart rhythm disorders or implantable cardioverter-defibrillators (ICDs) capable of delivering life-saving shocks were often treated as though they needed to live in a protective bubble, and sports participation was strictly prohibited. However, with advances in modern medicine and increased recognition of the importance of children’s psychosocial development, these old taboos have been completely overturned. Unless they have severe congenital heart abnormalities, children with implanted devices are strongly encouraged to participate in social activities and remain physically active.

Activities that children with implanted devices can safely perform include:

• Light walking
• Table tennis
• Recreational swimming
• Cycling
• Light gymnastics
• Nature walks

The golden rule is preventing direct hard impacts to the chest, where the device and its leads are located beneath the skin. A strong blow to the chest may damage the device itself or cause the delicate leads extending into the heart to become displaced or fractured.

Contact sports that should definitely be avoided include:

• Boxing
• Kickboxing
• Wrestling
• Weightlifting
• Competitive football
• American football

The device settings, the current functional status of the child’s heart, and the desired sport are evaluated together with the healthcare team to create an individualized activity plan. In this way, children can protect their health while also enjoying playing and participating alongside their peers.

What Can Be Expected During the Long-Term Follow-Up of Children with Premature Ventricular Contractions?

Children with benign, idiopathic rhythm disturbances and structurally normal hearts generally have an excellent long-term outlook. In most of these fortunate children, as they grow older and their hearts mature, the abnormal beats gradually become less frequent and often disappear completely. Even if they persist, these beats do not cause heart failure, shorten life expectancy, or interfere with adolescence and adulthood. Therefore, it is very important for families not to become overly anxious and to accept the natural course of the condition.

On the other hand, high-risk children with a high daily burden of abnormal beats who do not yet require surgery or ablation are monitored at shorter intervals. Regular echocardiographic examinations and Holter monitoring are performed every few months to carefully assess whether there is even the slightest decline in the heart’s pumping function or any enlargement of the cardiac chambers. At the earliest sign of deterioration, interventional treatments are implemented promptly to provide a permanent solution.

Frequently Asked Questions

Prof. Dr. İbrahim Cansaran TANIDIR

Prof. Dr. İbrahim Cansaran Tanıdır is an internationally recognized specialist with nearly 20 years of clinical, academic, and interventional experience in the fields of congenital heart diseases, pediatric interventional cardiology, hybrid procedures, and radiation-reduced / fluoroscopy-free catheterization techniques.

To date, he has performed more than 10,000 pediatric cardiac catheterization procedures both in Turkey and abroad, and has pioneered advanced interventional and hybrid applications in complex structural heart diseases in our country.

His academic productivity represents a scientifically strong authority with 110 SCI/SCIE publications, 1,440 citations, and an H-index of 18 (Google Scholar, 2025).