Cardiac Tamponade in a War Zone: Pericardiocentesis + TXA = Done?

This paper was sent to me by my mate Kane Guthrie… I think he was baiting me… but it is actually a fascinating read.

The Paper

Pericardiocentesis, drainage and instilled tranexamic acid: definitive management in a 25-case series of penetrating cardiac tamponade.  Qandil, Mohammed et al.   Injury, Volume 0, Issue 0, 113106 

A prospective case series from Nasser Medical Complex, Khan Younis, Gaza — a 700-bed tertiary trauma centre managing an average of 200 war casualties per day. Twenty-five patients with penetrating cardiac tamponade. One cardiac surgeon covering the entire region. Some patients arriving by horse and cart.

What They Did

Standard teaching says penetrating cardiac tamponade = get to the OR. Thoracotomy. Cardiac surgeon. Job done.

That wasn’t an option in Gaza.

So the emergency physicians developed a protocol:

1. eFAST first — confirm tamponade (effusion >2.5cm with haematoma), confirm preserved cardiac activity
2. Pericardiocentesis — subxiphoid approach, ultrasound-guided, using a 16G dialysis catheter (importantly, NOT a standard pericardiocentesis kit — more on that below)
3. Aggressive manual aspiration — 50ml syringe, drain until haemodynamic improvement
4. Intrapericardial TXA — 1 gram (10ml) instilled directly into the pericardial space
5. Drain left in situ for 48 hours with daily echos

That’s it. No thoracotomy. Done in the ED.  Patients were followed and there is good granular data about each case in the text.

Inclusion / Exclusion

This is critical and I’ll return to it in the appraisal section.

Included: penetrating chest trauma + clinical obstructive shock + echo-confirmed tamponade, presenting within ~3 hours, with preserved cardiac activity.

Excluded: cardiac arrest, absent myocardial contractility on echo, unsurvivable injuries.

The Results

Most of the patients in this series were young ( many were children aged 4 – 18 years and young adults.)

96% survival to discharge (most stayed 5-7 days) — the one death was from severe brain injury, not cardiac
– 0% thoracotomy rate  — definitive treatment in every surviving patient
– 8% recurrence — two patients needing repeat drainage (still no thoracotomy)
– No immediate procedural complications
– Some pulmonary complications (pneumonia, atelectasis) — related to associated thoracic injuries, not the procedure

Compare that to their historical thoracotomy-first approach: ~50% mortality

These numbers are striking. Remarkable, even. Barely believable.

Critical Appraisal — The Good Stuff First

This is a prospective consecutive series with a standardised protocol. In the context of an active war zone with constrained resources and overwhelming patient volumes, that’s genuinely impressive methodological rigour. They weren’t just retrospectively pulling charts — they designed a protocol, stuck to it, and reported honestly.

The clinical outcomes speak for themselves. 96% survival in penetrating cardiac tamponade is extraordinary by any benchmark.

And the physiology actually makes sense. For a patient with preserved cardiac activity, the authors argue the injury likely represents a self-sealing wound, predominantly in a low-pressure chamber. The pericardium itself then acts as a natural tamponade once the blood is drained — and the hypothesis is that intrapericardial TXA stabilises the clot at the wound site, effectively plugging it.

The large-bore catheter point is worth highlighting for practical purposes. They specifically use a 16G dialysis catheter rather than a standard pericardiocentesis kit. Their argument: standard kits are too small-bore to adequately evacuate blood (as opposed to serous fluid). Clinically logical, and an important technical detail if anyone is considering replicating this.

Selection Bias — The Goldilocks Zone Problem

This is the thorniest issue (common in trauma papers) , and the authors deserve credit for acknowledging it openly — but it’s worth unpacking further.

The 25 patients in this series existed in a very specific physiological sweet spot. Too sick to ignore, not sick enough to be unsalvageable. Preserved cardiac activity, haemodynamically compromised but not arrested, penetrating wound that was almost certainly to a low-pressure chamber, and survived long enough to reach hospital. Goldilocks patients, essentially — and the protocol worked beautifully on them.

But here’s the survivorship bias problem baked into that selection: the patients who didn’t make it into this series either died before arrival (likely high-pressure chamber injuries that bled out), were in cardiac arrest on arrival (straight to emergency thoracotomy or palliation), or had unsurvivable associated injuries. We never see those patients in the data. The 96% survival figure applies only to the cohort that was already, by definition, selected to do reasonably well.

And here’s the uncomfortable flipside for those of us in better-resourced settings: in a major trauma centre with early surgical access, you’d never find out who the Goldilocks patients are.  The moment you have penetrating cardiac tamponade and a cardiothoracic team in the building, those patients are going to the OR. You never get to observe which ones might have sealed spontaneously with a drain and some TXA, because you never leave them alone long enough to find out.

Gaza’s resource constraints (there was only 1 cardiothoracic surgeon in the whole region) created the conditions for a natural experiment that no ethics committee in a well-resourced setting would ever approve.

But that sobering reality is also, paradoxically, this paper’s greatest contribution. Because what Gaza’s resource constraints have inadvertently created is a natural experiment.  Natural experiments, for all their methodological messiness, are extraordinarily valuable when they generate findings that challenge existing dogma.

We now have 25 consecutive cases with a standardised protocol and a 96% survival rate suggesting that a carefully selected subgroup of penetrating cardiac tamponade patients may not need a thoracotomy at all.   This is exactly what you need to justify a prospective multicentre trial — the kind that could be run in high-resource settings, randomising haemodynamically stable penetrating tamponade patients between the surgical standard of care and the pericardiocentesis-drain-TXA protocol, with full ethics oversight and a proper control arm.

Nobody would have designed that trial before this paper existed. They might now.

The TXA Question — Don’t Get Carried Away

The intrapericardial TXA is the most novel and attention-grabbing component of this protocol, and it will inevitably generate excitement in FOAMed circles. Pump the brakes a little.

The authors’ hypothesis is elegant — instilled TXA stabilises the clot at the myocardial wound site, forming a natural plug contained by the pericardium. Mechanistically plausible. But this paper proves absolutely nothing about TXA’s specific contribution, and it’s important to say that clearly.

Here’s the problem: there is no control group. Every patient received TXA, large-bore drainage, 48-hour drain monitoring and serial echos. You cannot unpick which element drove the outcome. And in this highly selected Goldilocks cohort — preserved contractility, low-pressure chamber injuries, self-limiting haemorrhage — there’s a very real possibility that most of these patients would have done just as well with aggressive drainage alone.

Add to that the likelihood that many of these patients also received systemic TXA as part of routine major trauma management — which is already standard of care in most conflict and resource-limited settings. If systemic TXA is already on board doing its job, what exactly is the intrapericardial dose adding? We simply don’t know.

The TXA instillation hypothesis is interesting enough to warrant formal investigation. But until someone runs a trial with a control arm, we’re essentially pattern-matching on 25 cases and telling a compelling story. Compelling stories are not the same as evidence.

File it under: interesting, biologically plausible, hypothesis-generating, not proven.

My Bayesian senses tell me the TXA is probably window dressing here — a biologically plausible but ultimately redundant addition to a protocol whose heavy lifting is being done by timely decompression and a drain big enough to actually do the job. I could be wrong. But I’d want a control arm before I start instilling TXA into pericardial spaces on the strength of 25 uncontrolled cases.

Clinical application

Most of us aren’t working in Khan Younis. But the question this paper raises is relevant everywhere outside a major cardiothoracic centre:

In a patient with penetrating cardiac tamponade and preserved cardiac activity, is pericardiocentesis + drain a viable primary strategy rather than just a bridge to surgery?

For those of us in rural and remote emergency medicine, let’s be honest about the trauma we actually see. In Broome, we’re dealing with blunt trauma — predominantly MVAs — and the occasional knife injury. Bullets and bombs in the bush are vanishingly rare. So the direct clinical translation from a Gaza war zone to the Kimberley is limited, and it would be a stretch to pretend otherwise.

But here’s the thing that does translate: time.

In Gaza, the authors estimate most patients arrived within 1-3 hours of injury. In rural WA, 3-6 hours from injury to definitive care is not the exception — it’s the norm. The RFDS is coming, the retrieval is happening, but it takes time. And that time gap is actually the key variable in this whole story.

So ask yourself: what does the surviving cohort of significant chest trauma look like at the 3-6 hour mark in a rural Australian ED? By definition, they’ve already declared themselves — they’re not the immediate exsanguinators, not the tension pneumos that killed someone on scene. They’re the ones whose physiology has found some kind of equilibrium, however fragile.

Sound familiar? That’s the Goldilocks zone again.

Whether we’ll ever see the specific tamponade pattern described in this paper in our rural survivors is uncertain — the injury mechanisms are different, and blunt cardiac injury behaves differently from a shrapnel wound to the right ventricle. But the underlying principle — that a haemodynamically tenuous patient at the far end of a long retrieval window might respond to aggressive pericardial decompression as a bridge or even definitive treatment — is worth holding onto.

It’s not a protocol change. Not yet. But it’s worth knowing, and worth having the kit and the skills ready.

Bottom Line

This is a case series, not an RCT. It’s small, uncontrolled, and conducted in an environment most of us will never work in. You can’t transplant 96% survival figures into a teaching hospital context and assume equivalence.

But the findings are hypothesis-generating in the best possible way. The protocol is logical, the technical components are reproducible, and the outcomes are remarkable. This paper deserves serious attention from trauma guidelines committees — particularly the large-bore drainage component, which is the element most likely to be driving these results and which warrants formal prospective evaluation.

And beyond the clinical content: the fact that this protocol was born out of necessity, refined under extraordinary pressure, and rigorously documented by clinicians working in a war zone — that alone demands our respect and attention.

FOAM exists to spread knowledge. Share this one.