1. What Is a Parasternal Heave?
A parasternal heave (also called a lift) is a palpable outward thrust felt at the left sternal border during cardiac examination. It is usually detected by placing the heel of the hand just left of the sternum, over the fourth and fifth intercostal spaces. This sign suggests underlying cardiac pathology, especially involving the right ventricle. Recognizing it is a key skill for those learning cardiac examination.
The heave is created when an enlarged or overloaded right ventricle contracts forcefully against the chest wall. Unlike a normal apical impulse at the fifth intercostal space, a parasternal heave is more diffuse and felt closer to the sternum. But what does it mean if you detect one?
2. Why Parasternal Heave Matters
The presence of a parasternal heave provides a vital clinical clue. It can point to chronic pressure overload or hypertrophy (thickening) of the right ventricle. Timely detection may guide further diagnostic testing and prompt earlier management.
But while its presence suggests important pathology, the absence of a heave does not rule out disease. The sign is most useful when combined with a full cardiovascular assessment. Why is the right ventricle working harder, and what could be causing this anatomical change?
| Feature | Parasternal Heave |
|---|---|
| Location | Left sternal edge (4th–5th intercostal spaces) |
| Best Felt With | Heel of the hand, patient at 45° |
| Main Cause | Right ventricular hypertrophy or overload |
| Clinical Relevance | Suggests cardiac or pulmonary pathology |
| Additional Signs to Assess | Heart sounds, murmurs, jugular venous pressure |
3. Common Causes of a Parasternal Heave
A parasternal heave nearly always signals increased workload or hypertrophy of the right ventricle. This adapts when pressured by chronic lung or heart disorders. Understanding these causes helps direct further investigations.
- Pulmonary hypertension (raised pressure in the lung arteries, often from chronic lung disease)
- Chronic obstructive pulmonary disease (COPD)
- Pulmonary embolism (recurrent clots in lung vessels)
- Congenital heart disease (e.g., ventricular septal defect, tetralogy of Fallot)
- Mitral stenosis with secondary pulmonary hypertension
In rare cases, massive right ventricular infarction or certain valve diseases can also result in a heave. But are all heaves the same, and how can you recognize subtle variations?
4. How to Assess Parasternal Heave
Step-by-Step Examination
Performing a careful assessment is crucial. Follow these steps during physical examination:
- Ask the patient to lie at a 45° angle, supine position.
- Expose the chest, ensuring dignity and warmth.
- Place the heel of your right hand horizontally along the left sternal border (4th–5th intercostal spaces).
- Press gently but firmly, keeping your fingers off the chest (to avoid confusion with apical impulses).
- Feel for a sustained outward motion coinciding with systole.
- Note if the impulse is palpable, prolonged, or forceful (these suggest a positive heave).
The presence of a heave confirms that the right ventricle is contracting forcefully against the chest wall. But what differentiates a heave from other abnormal findings?
Tips to Differentiate a Parasternal Heave from Other Impulses
- Location: Parasternal heave is at the left sternal edge; an apical impulse is usually found at the 5th intercostal space, midclavicular line.
- Nature: Heaves are broad, lifting, and sustained; thrills are vibratory and best felt with fingertips.
- Timing: Parasternal heave is coincident with ventricular systole.
5. Clinical Interpretation and Pitfalls
The presence of a parasternal heave should always prompt clinicians to consider right ventricular hypertrophy, but context matters. Consider the patient’s symptoms, history, and associated findings.
Some pitfalls include misinterpreting a strong apex beat as a parasternal heave, or missing subtle heaves in obese or muscular patients. Always assess the entire precordium for additional cardiac signs and correlate with clinical context.
Key Points to Remember
- A parasternal heave is a physical finding, not a diagnosis.
- Look for supporting signs: loud P2, right-sided murmurs, elevated jugular venous pressure.
- Confirm with echocardiography or other imaging if suspected.
6. What to Do Next After Detecting a Parasternal Heave
After finding a parasternal heave, gather more information by:
- Taking a full clinical history (look for chronic cough, dyspnea, syncope, chest pain)
- Examining for peripheral edema, cyanosis, clubbing, and auscultatory findings
- Ordering investigations: 3-lead ECG placement (for right heart strain), chest X-ray, and echocardiography
- Referral to cardiology or respiratory specialists as indicated
Early recognition of the underlying cause can improve patient outcomes—especially in treatable conditions like pulmonary embolism or mitral stenosis.
7. SEO FAQ: Parasternal Heave
- Q: What does a parasternal heave look or feel like?
- A parasternal heave feels like a sustained, outward motion under the heel of the hand along the left sternal border during systole. It is not usually visible but can sometimes be seen in thin patients.
- Q: Is a parasternal heave always abnormal?
- Yes. It generally points to increased right ventricular workload and warrants further evaluation for cardiac or respiratory conditions.
- Q: Can a parasternal heave be a normal variant?
- No. While body habitus can affect palpation, a true parasternal heave is not considered a normal finding.
- Q: What is the clinical relevance of detecting a parasternal heave?
- Its detection helps clinicians suspect and investigate potentially serious conditions like pulmonary hypertension, right ventricular hypertrophy, or congenital heart disease.
- Q: How do you confirm the cause of a parasternal heave?
- Further testing such as echocardiography, ECG, and imaging is used to confirm right ventricular changes and the underlying pathology.
For learning purposes only. This guide is not a substitute for professional clinical assessment or medical advice.