management of the patient presenting with palpitation samir saba, md director, cardiac...
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Management of the Patient Presenting with
Palpitation
Samir Saba, MD
Director, Cardiac Electrophysiology
University of Pittsburgh
Definition
Perceptible unpleasant forcible pulsation of the heart, usually with an increase in frequency or force, with or without irregularity in rhythm.
Presentation
• Most common outpatient complaint in patients presenting to PCP and cardiologists
• 16% in one study of 500 patients
• Terminology used:– Rapid fluttering in the chest– Flop-flopping in the chest– Pounding in the neck
Etiology
• Cardiac:– Arrhythmias– Cardiac and extracardiac
shunts– Valvular heart disease– Pacemaker– Atrial myxoma– Cardiomyopathy
• Psychiatric:– Panic disorders– Anxiety disorders– Somatization– Depression
Etiology• Medication:
– Sympathomimetic– Vasodilators– Anticholinergic -blocker withdrawal
• Catecholamine Stress:– Exercise– Stress
• Habits:– Cocaine– Amphetamines– Caffeine– Nicotine
Etiology
• Metabolic disorders:– Hypoglycemia– Thyrotoxicosis– Pheochromocytoma– Mastocytosis– Scombroid Food
Poisoning
• High output states:– Anemia– Pregnancy– Fever– Paget’s disease
Arrhythmic Etiologies
• PAC/PVC
• Sinus arrhythmias
• SVT (AF, Aflutter, ORT, AVNRT, AT)
• Idiopathic ventricular arrhythmias (RVOT, LVOT, fascicular VT)
• Life-threatening ventricular arrhythmias (MMVT, PMVT, TdP, VFlutter, VF)
Approach to the Patient
1. Is the cause of palpitations possibly a life-threatening condition? (Usually cardiac etiology)
• Majority of outpatients have benign etiologies
2. How can we make the patient feel better?
Predictors of Cardiac Etiology
• Male gender
• Reporting irregular heart beats
• History of heart disease
• Event duration > 5 minutes
History
• Circumstances:– Association with anxiety or panic (20% of palpitations
are due to panic attacks and 67% of patients with SVT where diagnosed at some point with panic disorder)
– Association with stress (arrhythmias benign and fatal)– Association with position (AVNRT pr PAC/PVC)– Association with syncope or near-syncope (high level
of suspicion for VA)
Evaluation• Detailed History:
– Age – Onset– Duration– Circumstances – Symptoms– Termination – Maneuvers (CSM, valsalva)– Regularity (tap out the rhythm)– Medications– Habits– Psychiatric disorders
Evaluation
• Physical Exam:– Rarely during
palpitations– Auscultation (MVP,
HCM, chronic AF)– Evidence of CMP,
valvular disease, congenital abnormalities
Evaluation
• 12-Lead ECG:– PAC/PCV/SVT/VT– WPW– LVH/LAE/RAE– Long QT, Brugada,
ARVD– Old MI– Conduction
abnormalities predisposing to TdP
Evaluation: Further Diagnostic Testing
• The diagnostic yield of history, P/E, and ECG is 1/3.
• Further diagnostic testing is needed in 3 groups of patients:
1. Those in whom the initial dx suggests arrhythmias
2. Those at high risk of arrhythmias
3. Those who remain anxious about arrhythmias
Diagnostic Testing
• Rule out structural abnormalities of the heart– Echo– Stress test– Cardiac Cath– MRI
Diagnostic Testing
• Document arrhythmia in the setting of symptoms– Ambulatory monitors
(HM (yield is 33-35%),, Event recorder, Loop monitor (yield is 66-88%), continuous ambulatory monitors)
– ILR, EP testing
Inappropriate Sinus Tachycardia
• Diagnosis of exclusion after ruling out:– Thyrotoxicosis, anemia, fever, dehydration,
arrhythmias, etc…
• Formulas:– HR max = 220 - age– HR max = 205.8 − (0.685 X age)
• Therapy: -blockers or CCB– Sinus node modification (high recurrence rate, need a
PM, paralysis of phrenic nerve)
Take Home Points
1. Palpitations are very common
2. Differentiating between cardiac and non cardiac causes is essential
3. History, PE, ECG are essential with a yield of 1/3
4. Continuous event monitors are a good adjunct tool with a good diagnostic yield (up to 88%)
5. Therapy can be directed to cause but also empiric (-blockers)