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Valsalva Retinopathy
ROUTINE — Retina
Symptoms
- sudden vision loss: painless blur or a "blind spot" appearing immediately after straining
- trigger history: heavy lifting, forceful coughing, vomiting, constipation, or even vigorous wind-instrument playing
- floaters: if the blood breaks through the membranes into the vitreous jelly
Clinical Findings
Classic presentation
- "boat-shaped" hemorrhage: a well-demarcated pool of blood with a flat top (fluid level) when the patient is upright
- location: almost always overlies the macula (the central vision area)
- anatomic planes: blood can be trapped under the ILM (tight, round) or under the hyaloid face (larger, boat-shaped)
Disease course
- color change: the bright red blood turns yellow or white over several weeks as it breaks down
- quiet retina: no signs of diabetic retinopathy, tears, or leaky vessels elsewhere
Etiology
Mechanism
- venous pressure spike: straining causes a sudden rise in intraocular venous pressure
- capillary rupture: superficial retinal capillaries "pop" under the sudden stress
- risk factors: uncontrolled hypertension, blood thinners, or clotting disorders
Red Flags
- large premacular hemorrhage: if the blood is thick and covers the entire macula, spontaneous clearing can take months
- breakthrough hemorrhage: blood moving into the vitreous (vitreous hemorrhage) can further obscure vision
- recurrence: multiple episodes without a clear trigger suggest an underlying bleeding disorder or severe hypertension
Investigations
Imaging
- oct macula: the "gold standard" to see exactly which layer the blood is trapped in (sub-ILM vs. sub-hyaloid)
- b-scan ultrasound: used only if the blood is so thick the doctor can't see the retina at all
Systemic workup
- blood pressure: must be checked at the time of the event
- blood labs: CBC and PT/INR if the patient is on anticoagulants or has easy bruising
Treatment
Observation
- first-line: most patients recover 20/20 vision without any intervention as the body reabsorbs the blood
Nd:YAG laser membranotomy
- procedure: a quick laser pulse "pokes a hole" in the membrane holding the blood
- effect: the blood drains out into the bottom of the eye, clearing the central vision almost instantly
Surgical
- vitrectomy: reserved for cases where the blood doesn't clear after 3 months or if complications arise
Clinical Pearl
A perfectly round preretinal blood blob after weightlifting or labor is Valsalva retinopathy — most resolve in weeks, but Nd:YAG membranotomy drains a large hemorrhage in seconds.
Differential Diagnosis
- • ruptured macroaneurysm (usually older patients with hypertension; often more yellowish exudate)
- • proliferative diabetic retinopathy (look for laser scars, or bleeding in the other eye)
- • terson syndrome (vitreous hemorrhage associated with a subarachnoid brain bleed)