36.6% of hypertensive patients had a thickened heart

Left ventricular hypertrophy is the thickening of the heart's main pumping chamber and is treated as a cardinal marker of hypertensive heart disease, the structural damage that follows years of raised blood pressure. Because it is picked up on echocardiography before symptoms appear, its prevalence is a useful audit of how well blood pressure is actually being controlled across populations. An updated picture covering the last 15 years was missing, which matters because treatment guidelines, drug availability and detection have all changed over that period. This meta-analysis set out to quantify how common the finding is in people already identified as hypertensive.

The authors searched PubMed, OVID-MEDLINE and the Cochrane Library for English-language articles published from 1 January 2011 to 31 December 2025, combining terms covering left ventricular hypertrophy, left ventricular mass, hypertensive heart disease, echocardiography, hypertension and subclinical cardiac damage. They included studies reporting echocardiographic assessment of left ventricular hypertrophy in hypertensive patients, using the definitions recommended by echocardiographic guidelines. In total 51 studies covering 74 632 hypertensive patients were analysed. Subsets of the data were used for specific questions: 18 studies with 40 108 patients for the comparison between men and women, and 17 studies for the split between concentric and eccentric patterns.

The pooled prevalence of left ventricular hypertrophy was 36.6%, with a 95% confidence interval of 33.4-40%. In the sex comparison, men had lower odds of hypertrophy than women (OR 0.62, CI 0.48-0.80), a difference that reached high statistical significance. Among patients who did have hypertrophy, the concentric pattern was almost twice as likely as the eccentric pattern (OR 1.94, CI 1.52-2.49). The authors interpret the persistently high prevalence as evidence that prevention and treatment of hypertensive heart disease is falling short internationally, and call for more aggressive management of blood pressure and related risk factors, particularly in women.

The analysis updates and confirms the long-standing view that structural cardiac damage is common in treated and untreated hypertension rather than an occasional complication. The sex difference sharpens an existing thread in the literature, pointing towards women as a group where detection and treatment intensity may lag. What the design cannot do is establish causation or disentangle contributors such as duration of hypertension, obesity, medication adherence or differences in how the studies defined hypertrophy. Prevalence pooled across 51 heterogeneous clinic-based cohorts will also reflect who gets referred for an echocardiogram in the first place.

If you have raised blood pressure, this is context on why it is monitored so persistently: over a third of pooled hypertensive patients had measurable thickening of the left ventricle. The finding that women had higher odds than men is a reason to think the risk is not lower in women, which is the opposite of a common assumption about heart disease. None of this speaks to any individual's heart, since the numbers describe populations attending clinics and studies varied in how they measured. It is a reason to take blood pressure figures seriously rather than a prediction about anyone in particular.