{"id":2927,"date":"2026-02-27T20:47:38","date_gmt":"2026-02-27T20:47:38","guid":{"rendered":"https:\/\/www.bestspinehospitals.com\/blog\/premature-ventricular-contraction-definition-uses-and-clinical-overview\/"},"modified":"2026-02-27T20:47:38","modified_gmt":"2026-02-27T20:47:38","slug":"premature-ventricular-contraction-definition-uses-and-clinical-overview","status":"publish","type":"post","link":"https:\/\/www.bestspinehospitals.com\/blog\/premature-ventricular-contraction-definition-uses-and-clinical-overview\/","title":{"rendered":"Premature Ventricular Contraction: Definition, Uses, and Clinical Overview"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Premature Ventricular Contraction Introduction (What it is)<\/h2>\n\n\n\n<p>Premature Ventricular Contraction is an early heartbeat that starts in the ventricles (the heart\u2019s lower chambers).<br\/>\nIt is a type of cardiac arrhythmia, meaning an abnormal heart rhythm, and it often feels like a \u201cskip\u201d or \u201cthump.\u201d<br\/>\nIt is commonly identified on an electrocardiogram (ECG\/EKG) or ambulatory monitors such as a Holter monitor.<br\/>\nClinicians use it as a descriptive rhythm finding to guide symptom evaluation and risk assessment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Premature Ventricular Contraction used (Purpose \/ benefits)<\/h2>\n\n\n\n<p>Premature Ventricular Contraction is not a treatment or device\u2014it&#8217;s a clinical term that describes a specific heartbeat pattern. Recognizing and naming it has practical benefits in cardiovascular care because it helps clinicians communicate what they are seeing and decide what additional evaluation (if any) is appropriate.<\/p>\n\n\n\n<p>Common purposes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Explaining symptoms.<\/strong> Some people notice palpitations (an awareness of heartbeat), brief chest fluttering, a \u201cpause,\u201d or a strong beat after the pause. Premature Ventricular Contraction can be a rhythm explanation for these sensations.<\/li>\n<li><strong>Distinguishing benign from potentially significant rhythm patterns.<\/strong> In many settings, isolated premature beats can be incidental. In other settings\u2014especially when there is known heart disease\u2014ventricular ectopy may carry different implications. Interpretation varies by clinician and case.<\/li>\n<li><strong>Risk stratification (estimating likelihood of associated conditions).<\/strong> The presence, frequency, and pattern of premature ventricular beats may prompt clinicians to look for contributors such as structural heart disease, ischemia (reduced blood flow to heart muscle), electrolyte imbalance, medication effects, or other arrhythmias.<\/li>\n<li><strong>Guiding diagnostic testing choices.<\/strong> Finding Premature Ventricular Contraction on an ECG can lead to targeted follow-up testing such as extended rhythm monitoring or cardiac imaging, depending on the overall clinical context.<\/li>\n<li><strong>Tracking change over time.<\/strong> For patients with recurring symptoms or known rhythm issues, clinicians may compare the pattern over time (for example, on repeat monitoring) to see if the rhythm finding is stable, improving, or increasing.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Clinical context (When cardiologists or cardiovascular clinicians use it)<\/h2>\n\n\n\n<p>Premature Ventricular Contraction is typically referenced or assessed in situations such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Palpitations, \u201cskipped beats,\u201d or intermittent pounding heartbeat<\/li>\n<li>Incidental finding on routine ECG, preoperative testing, or sports screening<\/li>\n<li>Review of telemetry in the hospital (continuous rhythm monitoring)<\/li>\n<li>Evaluation after syncope (fainting) or near-syncope, depending on the broader history<\/li>\n<li>Assessment of patients with known structural heart disease (cardiomyopathy, valve disease, prior myocardial infarction), where ventricular rhythms may be interpreted differently<\/li>\n<li>Investigation of symptoms that occur with exertion, stress, caffeine, alcohol, illness, or sleep disruption<\/li>\n<li>Evaluation of potential medication or stimulant effects (prescription, over-the-counter, or recreational)<\/li>\n<li>Follow-up of rhythm-monitor results reporting \u201cPVCs,\u201d \u201cventricular ectopy,\u201d \u201ccouplets,\u201d or \u201cruns\u201d (terms that describe patterns of early ventricular beats)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Contraindications \/ when it\u2019s NOT ideal<\/h2>\n\n\n\n<p>Because Premature Ventricular Contraction is a descriptive diagnosis rather than a procedure, \u201ccontraindications\u201d mainly apply to <strong>interpretation<\/strong> and to situations where focusing on PVCs alone may be misleading.<\/p>\n\n\n\n<p>Situations where the label or interpretation may be <strong>not ideal<\/strong> include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ECG artifact or poor-quality recordings<\/strong> (motion, loose electrodes, electrical interference) that can mimic premature beats<\/li>\n<li><strong>Misclassification of supraventricular beats with aberrancy<\/strong> (a beat from the atria that conducts abnormally through the ventricles can look wide and resemble a ventricular beat)<\/li>\n<li><strong>Paced rhythms<\/strong> (pacemaker spikes and paced QRS complexes can complicate interpretation of ectopy)<\/li>\n<li><strong>Baseline conduction abnormalities<\/strong> (such as bundle branch block) that make QRS complexes wide and can obscure the distinction between ventricular and supraventricular ectopy<\/li>\n<li><strong>Unstable clinical presentations<\/strong> (for example, severe chest pain, hemodynamic instability, or signs of shock), where broader emergency evaluation typically takes priority over fine rhythm labeling<\/li>\n<li><strong>Over-reliance on a single snapshot ECG<\/strong>, since premature beats can be intermittent; clinicians may prefer longer monitoring when symptom-rhythm correlation is needed<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How it works (Mechanism \/ physiology)<\/h2>\n\n\n\n<p>Premature Ventricular Contraction reflects an <strong>early electrical activation<\/strong> that originates in ventricular tissue rather than following the heart\u2019s usual conduction route.<\/p>\n\n\n\n<p>Key physiology concepts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Normal activation pathway.<\/strong> Under typical conditions, the heartbeat starts in the sinoatrial (SA) node in the right atrium, travels through the atria, then passes the atrioventricular (AV) node into the His\u2013Purkinje system to activate the ventricles in a coordinated way.<\/li>\n<li><strong>What changes in Premature Ventricular Contraction.<\/strong> A PVC begins in the ventricles (or distal conduction system) earlier than the next expected sinus beat. Because it does not use the normal conduction pattern, the ECG often shows a <strong>wide QRS complex<\/strong> with a different shape than the person\u2019s usual beats.<\/li>\n<li><strong>Compensatory pause and the \u201cthump.\u201d<\/strong> After a PVC, there is often a pause before the next normal beat. The beat after the pause may feel stronger due to slightly increased ventricular filling time, which can amplify the perception of a \u201cthud.\u201d<\/li>\n<li><strong>Potential triggers and contributors.<\/strong> PVCs can be influenced by autonomic tone (adrenaline and vagal activity), sleep and stress, stimulants, electrolyte shifts, ischemia, inflammation, and structural heart changes. The relevance of any trigger varies by clinician and case.<\/li>\n<li><strong>Clinical interpretation.<\/strong> A PVC can be an isolated electrical event or part of a broader arrhythmia pattern. Interpretation depends on frequency, morphology (shape), coupling interval (timing), symptoms, and whether there is underlying heart disease.<\/li>\n<\/ul>\n\n\n\n<p>Time course and reversibility:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Intermittent nature.<\/strong> PVCs may appear sporadically and can cluster during certain times of day or specific activities.<\/li>\n<li><strong>Variable persistence.<\/strong> Some patterns are transient (for example, during acute illness), while others may be chronic.<\/li>\n<li><strong>Meaning depends on context.<\/strong> The same ECG finding may be considered low concern in one person and more clinically relevant in another, depending on comorbidities and test results.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Premature Ventricular Contraction Procedure overview (How it\u2019s applied)<\/h2>\n\n\n\n<p>Premature Ventricular Contraction is not a procedure. Clinically, it is <strong>identified, quantified, and interpreted<\/strong> using a structured rhythm evaluation workflow.<\/p>\n\n\n\n<p>A typical high-level pathway includes:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\n<p><strong>Evaluation\/exam<\/strong>\n   &#8211; Symptom review (timing, triggers, associated dizziness, chest discomfort, shortness of breath)\n   &#8211; Past history (heart disease, thyroid disease, sleep issues, medication and stimulant exposure)\n   &#8211; Physical exam and baseline vitals, when assessed in clinic or hospital<\/p>\n<\/li>\n<li>\n<p><strong>Preparation<\/strong>\n   &#8211; Selection of the most appropriate rhythm tool (standard ECG vs longer monitoring)\n   &#8211; Instructions for ambulatory monitoring (how the device is worn, symptom diary use), which vary by device and clinic<\/p>\n<\/li>\n<li>\n<p><strong>Intervention\/testing<\/strong>\n   &#8211; <strong>12-lead ECG<\/strong> to document rhythm and QRS morphology\n   &#8211; <strong>Ambulatory monitoring<\/strong> (Holter\/event\/patch monitor) to assess frequency and correlate symptoms with rhythm\n   &#8211; <strong>Cardiac imaging<\/strong> (often echocardiography) to evaluate structure and function when clinically indicated\n   &#8211; <strong>Additional testing<\/strong> may be considered in selected cases (for example, exercise testing to see how ectopy behaves with exertion), depending on the presentation<\/p>\n<\/li>\n<li>\n<p><strong>Immediate checks<\/strong>\n   &#8211; Review for red-flag patterns on recordings (for example, sustained ventricular tachycardia, very rapid rhythms, or concerning associated findings), interpreted by trained clinicians\n   &#8211; Assessment for correct device placement and signal quality for ambulatory monitors<\/p>\n<\/li>\n<li>\n<p><strong>Follow-up<\/strong>\n   &#8211; Discussion of what was found (PVC burden, patterns, associated rhythms)\n   &#8211; Plans for repeat monitoring or additional evaluation when appropriate\n   &#8211; Ongoing reassessment if symptoms or clinical status changes<\/p>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Types \/ variations<\/h2>\n\n\n\n<p>Premature Ventricular Contraction can be described in several clinically useful ways. These descriptors help clinicians communicate patterns and consider potential sources and implications.<\/p>\n\n\n\n<p>Common variations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Isolated PVCs vs frequent PVCs<\/strong><\/li>\n<li>Isolated beats occur sporadically.<\/li>\n<li>\n<p>Frequent ectopy may be described by \u201cPVC burden\u201d (the proportion of beats that are PVCs on a monitor).<\/p>\n<\/li>\n<li>\n<p><strong>Unifocal (monomorphic) vs multifocal (polymorphic)<\/strong><\/p>\n<\/li>\n<li><strong>Unifocal\/monomorphic:<\/strong> PVCs have a consistent shape on ECG, suggesting a single dominant origin.<\/li>\n<li>\n<p><strong>Multifocal\/polymorphic:<\/strong> PVCs show more than one morphology, suggesting multiple origins or changing activation patterns.<\/p>\n<\/li>\n<li>\n<p><strong>Patterns on rhythm strips<\/strong><\/p>\n<\/li>\n<li><strong>Bigeminy:<\/strong> every other beat is a PVC.<\/li>\n<li><strong>Trigeminy:<\/strong> every third beat is a PVC.<\/li>\n<li><strong>Couplets:<\/strong> two PVCs in a row.<\/li>\n<li>\n<p><strong>Triplets or short runs:<\/strong> three or more ventricular beats consecutively may be described as a brief run; terminology can vary by clinician and report style.<\/p>\n<\/li>\n<li>\n<p><strong>Interpolated PVCs vs PVCs with a compensatory pause<\/strong><\/p>\n<\/li>\n<li>An <strong>interpolated<\/strong> PVC occurs between two normal beats without a full pause.<\/li>\n<li>\n<p>Many PVCs are followed by a <strong>pause<\/strong> before the next sinus beat.<\/p>\n<\/li>\n<li>\n<p><strong>Site-of-origin descriptions (inferred)<\/strong><\/p>\n<\/li>\n<li>\n<p>Some PVC morphologies suggest origin from the right ventricular outflow tract (RVOT) or left-sided structures, but precise localization is typically an electrophysiology-level assessment and may require specialized mapping if pursued.<\/p>\n<\/li>\n<li>\n<p><strong>PVCs in specific clinical contexts<\/strong><\/p>\n<\/li>\n<li>Occurring at rest vs with exercise<\/li>\n<li>Present during sleep vs daytime activity<\/li>\n<li>Seen in structurally normal hearts vs in cardiomyopathy or ischemic heart disease<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Pros and cons<\/h2>\n\n\n\n<p>Pros:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Helps standardize communication about a common rhythm finding across clinicians and reports<\/li>\n<li>Can explain palpitations and the \u201cskipped beat\u201d sensation in a physiologic way<\/li>\n<li>Often identifiable with noninvasive tests (ECG and ambulatory monitors)<\/li>\n<li>Patterns (morphology, timing, frequency) can be tracked over time<\/li>\n<li>Can prompt evaluation for reversible contributors (when clinically appropriate)<\/li>\n<li>Supports broader arrhythmia assessment, including symptom\u2013rhythm correlation<\/li>\n<\/ul>\n\n\n\n<p>Cons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A single ECG may miss intermittent PVCs or overemphasize a brief snapshot<\/li>\n<li>Automated ECG or monitor interpretations can misclassify beats; expert review may be needed<\/li>\n<li>Symptoms do not always correlate with PVC frequency (some patients feel few PVCs intensely; others feel many not at all)<\/li>\n<li>The clinical significance varies widely by patient context, which can make counseling and interpretation complex<\/li>\n<li>Focus on PVCs alone can distract from other causes of symptoms (anxiety, anemia, thyroid disease, medication effects, structural disease), depending on the presentation<\/li>\n<li>Some patterns overlap with other rhythms (aberrant conduction, paced beats), requiring careful differentiation<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Aftercare &amp; longevity<\/h2>\n\n\n\n<p>Because Premature Ventricular Contraction is a rhythm finding rather than a treatment, \u201caftercare\u201d typically refers to <strong>ongoing monitoring and context-based follow-up<\/strong> after PVCs are identified.<\/p>\n\n\n\n<p>General factors that influence outcomes or the durability of findings over time include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Underlying heart structure and function.<\/strong> Whether imaging shows normal ventricular function or a cardiomyopathy can influence how PVCs are interpreted over time.<\/li>\n<li><strong>PVC frequency and pattern stability.<\/strong> Some people have stable, intermittent ectopy for years; others have changing patterns, often influenced by illness, stress, sleep disruption, or medication changes. The course varies by clinician and case.<\/li>\n<li><strong>Comorbidities.<\/strong> Conditions such as coronary artery disease, hypertension, sleep-disordered breathing, thyroid disorders, and chronic lung disease may affect arrhythmia expression and clinical relevance.<\/li>\n<li><strong>Follow-up strategy.<\/strong> Some cases involve periodic reassessment with ECGs or repeat monitoring, especially when symptoms change or if there is concern for high ectopy burden.<\/li>\n<li><strong>If treatment is used.<\/strong> In some patients, clinicians may consider medications or catheter ablation to reduce symptomatic or high-burden PVCs; the durability of benefit depends on the individual substrate and approach.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Alternatives \/ comparisons<\/h2>\n\n\n\n<p>Premature Ventricular Contraction is one way to describe extra or early beats, but clinicians often compare it with other rhythm possibilities and management pathways.<\/p>\n\n\n\n<p>High-level comparisons include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Observation\/monitoring vs active rhythm suppression<\/strong><\/li>\n<li>When PVCs are infrequent and the heart structure is reassuring, clinicians may choose monitoring and reassurance rather than rhythm-directed therapy.<\/li>\n<li>\n<p>When PVCs are frequent, highly symptomatic, or associated with ventricular dysfunction, clinicians may discuss rhythm suppression options. Decisions vary by clinician and case.<\/p>\n<\/li>\n<li>\n<p><strong>PVCs vs premature atrial contractions (PACs)<\/strong><\/p>\n<\/li>\n<li>PACs originate in the atria and often produce a narrow QRS complex unless there is aberrant conduction.<\/li>\n<li>\n<p>PVCs originate in the ventricles and more commonly produce a wide QRS complex. Differentiation can matter for prognosis and treatment discussions.<\/p>\n<\/li>\n<li>\n<p><strong>Short ambulatory monitoring vs longer-term monitoring<\/strong><\/p>\n<\/li>\n<li>A 24\u201348 hour Holter monitor can quantify daily PVC patterns.<\/li>\n<li>\n<p>Longer patch\/event monitoring may be chosen when symptoms are infrequent or episodic.<\/p>\n<\/li>\n<li>\n<p><strong>Medication vs catheter ablation (when rhythm reduction is pursued)<\/strong><\/p>\n<\/li>\n<li>Medications (such as beta-blockers or other antiarrhythmics) may reduce symptoms or ectopy in some patients, but responses and side-effect profiles vary.<\/li>\n<li>\n<p>Catheter ablation targets the focus of PVC origin using electrophysiology mapping; it is an invasive procedure and is typically considered selectively.<\/p>\n<\/li>\n<li>\n<p><strong>Echocardiography vs cardiac MRI (in selected patients)<\/strong><\/p>\n<\/li>\n<li>Echocardiography assesses chamber size, systolic function, and valve disease.<\/li>\n<li>Cardiac MRI can provide more detailed tissue characterization (such as scar patterns) in selected cases, depending on resources and clinical questions.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Premature Ventricular Contraction Common questions (FAQ)<\/h2>\n\n\n\n<p><strong>Q: What does Premature Ventricular Contraction feel like?<\/strong><br\/>\nMany people describe a skipped beat, a flip-flop sensation, fluttering, or a strong \u201cthump\u201d in the chest. Some people feel nothing and only learn about it from an ECG or monitor report. Symptom intensity does not always match the number of PVCs recorded.<\/p>\n\n\n\n<p><strong>Q: Is Premature Ventricular Contraction dangerous?<\/strong><br\/>\nIt can be benign in many individuals, especially when isolated and occurring in the setting of a normal heart evaluation. In other situations\u2014such as known structural heart disease or very frequent ectopy\u2014clinicians may interpret it differently and consider additional assessment. Risk interpretation varies by clinician and case.<\/p>\n\n\n\n<p><strong>Q: How is Premature Ventricular Contraction diagnosed?<\/strong><br\/>\nIt is most commonly identified on a 12-lead ECG or on ambulatory rhythm monitoring (Holter, patch monitors, event monitors). Clinicians may also use echocardiography or other tests to understand heart structure and function when indicated. Diagnosis typically combines rhythm documentation with clinical context.<\/p>\n\n\n\n<p><strong>Q: Does it require hospitalization?<\/strong><br\/>\nPVCs identified in an outpatient setting often do not require hospitalization by themselves. Hospitalization decisions depend on the overall presentation, associated symptoms (such as syncope), and other findings on testing. This varies by clinician and case.<\/p>\n\n\n\n<p><strong>Q: Can Premature Ventricular Contraction go away on its own?<\/strong><br\/>\nIn some people, PVCs are intermittent and may decrease when triggers change or an acute illness resolves. In others, they can persist for long periods with waxing and waning frequency. The time course is variable.<\/p>\n\n\n\n<p><strong>Q: What tests are commonly done after PVCs are found?<\/strong><br\/>\nCommon next steps may include ambulatory rhythm monitoring to quantify frequency and correlate symptoms, and echocardiography to assess cardiac structure and function. Additional tests (exercise testing, lab work, cardiac MRI) are considered selectively based on the clinical scenario. The testing plan varies by clinician and case.<\/p>\n\n\n\n<p><strong>Q: What are the main treatment options if clinicians decide treatment is needed?<\/strong><br\/>\nOptions may include observation, symptom-directed medications, addressing contributing factors identified on evaluation, or catheter ablation in selected patients. Each approach has different goals\u2014symptom relief, ectopy reduction, or evaluation of associated heart disease. Choice depends on symptoms, PVC pattern, comorbidities, and clinician judgment.<\/p>\n\n\n\n<p><strong>Q: Does treatment permanently eliminate PVCs?<\/strong><br\/>\nSome approaches reduce PVC frequency substantially, while others mainly reduce symptoms. Even after improvement, PVCs can recur over time, especially if underlying triggers or substrate remain. Durability varies by clinician and case.<\/p>\n\n\n\n<p><strong>Q: Is the evaluation painful?<\/strong><br\/>\nMost diagnostic steps are noninvasive and typically not painful, such as ECGs, echocardiograms, and wearing a monitor. If an invasive procedure is pursued (such as an electrophysiology study or ablation), discomfort expectations depend on sedation practices and procedural details. Experiences vary.<\/p>\n\n\n\n<p><strong>Q: How much does evaluation or treatment cost?<\/strong><br\/>\nCosts vary widely based on location, insurance coverage, facility setting, and the type of monitoring or procedures involved. In general, an office ECG differs in cost from multi-day monitoring, imaging, or catheter-based procedures. Cost details vary by clinician and case.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Premature Ventricular Contraction is an early heartbeat that starts in the ventricles (the heart\u2019s lower chambers). It is a type of cardiac arrhythmia, meaning an abnormal heart rhythm, and it often feels like a \u201cskip\u201d or \u201cthump.\u201d It is commonly identified on an electrocardiogram (ECG\/EKG) or ambulatory monitors such as a Holter monitor. Clinicians use it as a descriptive rhythm finding to guide symptom evaluation and risk assessment.<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2927","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Premature Ventricular Contraction: Definition, Uses, and Clinical Overview - Best Spine Hospitals<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bestspinehospitals.com\/blog\/premature-ventricular-contraction-definition-uses-and-clinical-overview\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Premature Ventricular Contraction: Definition, Uses, and Clinical Overview - Best Spine Hospitals\" \/>\n<meta property=\"og:description\" content=\"Premature Ventricular Contraction is an early heartbeat that starts in the ventricles (the heart\u2019s lower chambers). It is a type of cardiac arrhythmia, meaning an abnormal heart rhythm, and it often feels like a \u201cskip\u201d or \u201cthump.\u201d It is commonly identified on an electrocardiogram (ECG\/EKG) or ambulatory monitors such as a Holter monitor. 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It is a type of cardiac arrhythmia, meaning an abnormal heart rhythm, and it often feels like a \u201cskip\u201d or \u201cthump.\u201d It is commonly identified on an electrocardiogram (ECG\/EKG) or ambulatory monitors such as a Holter monitor. 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