Harley Street Heart & Vascular Centre is a Singapore cardiology clinic offering cardiac consultations, ECG screening, and a full diagnostic workup for heart-health concerns. When they engaged us in August 2025, the site looked healthy on paper — domain rating 34, roughly 8,300 organic keywords, and around 7,400 monthly organic visits. The problem was that almost none of that traffic was walking into the clinic.
The ranking profile told the story. The site was performing well for informational queries like “heart palpitations after eating” (13K/mo) and “cardiovascular endurance exercises” (6.3K/mo) — useful for brand awareness, useless for filling consultation slots. On the commercial queries that actually drive patients through the door, the clinic was near-invisible. Competitors at a fraction of their domain rating — heartspecialistintl.com.sg at DR 1.3, eheartspecialist.com at DR 3.9 — were ranking above them for “Heart Specialist Singapore” and “Cardiologist Singapore” because their on-page architecture and backlink profiles were aligned to those specific commercial queries. Higher DR was losing to better-targeted signals.
Brief
The engagement scope was narrow and commercially framed. Five agreed keyword targets, all high-intent:
- Cardiologist Singapore
- Heart Specialist Singapore
- ECG Singapore
- Heart Doctor Singapore
- Heart Clinic Singapore
Starting positions ranged from rank 4 on the clinic’s best term to 20+ or unranked on the most valuable ones. The objective was Page 1 on all five within the engagement window, measured alongside on-site conversion events (Book Appointment, Book Teleconsult, WhatsApp, phone clicks) tracked in GA4. Traffic volume was explicitly deprioritised — we agreed upfront that a smaller number of commercially-intended visitors was worth more than the existing informational base.
Approach
Budget was weighted 80–90% toward off-page work, with the remainder split across on-page corrections and cornerstone content. The split reflected the diagnosis: on-page was a quick fix, the authority gap to target-aligned competitors was what needed sustained investment.
1. On-page realignment. Meta titles and descriptions across the core service pages had been optimising for lower-volume or generic variants of the target terms. We rewrote metadata on the five priority landing pages to lead with the agreed commercial keywords, tightened H1s to match, and resolved a handful of internal linking gaps where the service pages were being starved of equity by the blog.
2. Link building on medical-relevant properties. Guest posts on Singapore health and medical news publications, link insertions on local medical directories, and partner placements with adjacent practitioners — dietitians, physiotherapists, heart-health non-profits. Medical is YMYL territory and Google is unforgiving about link quality signals from off-topic or low-trust sources, so every placement was vetted for editorial standards and topical relevance before we put the clinic’s name on it. Four media features were earned through direct outreach rather than paid placement.
3. Cornerstone content. Six long-form articles building topical cardiology authority around the target keyword cluster — condition explainers, diagnostic workflow pieces, and procedural guides — all written to the EEAT bar the medical vertical requires, reviewed by the clinical team, and structured to funnel internal links toward the five priority service pages.
4. Measurement. Keyword rank tracking on the five targets plus a supporting cluster, and GA4 event tracking on every meaningful conversion action — Book Appointment, Book Teleconsult, WhatsApp floating-icon, WhatsApp contact-us, phone clicks. The conversion tracking was the piece that mattered most: ranking improvements are only interesting if they translate to commercial behaviour on the site.
Result
By March 2026 — eight months in — all five target keywords were ranking on Page 1:
- Cardiologist Singapore: rank 5 (from unranked — the target page had been blocked from indexing before the engagement)
- Heart Specialist Singapore: rank 4 (from 20+)
- ECG Singapore: rank 4 (from 13)
- Heart Doctor Singapore: rank 3 (from 18)
- Heart Clinic Singapore: rank 5 (from 4 — already close at start, now stabilised on Page 1)
March 2026 conversion activity: 391 Book Appointment clicks from 233 unique users, 256 Book Teleconsult clicks from 153 unique users, 60 WhatsApp floating-icon clicks from 51 unique users, and 39 WhatsApp contact-us clicks from 25 unique users. In total, 362 unique users initiated a commercial intent action in the month, against a backdrop of 9,611 users, 11,137 sessions, and 12,813 pageviews. Singapore traffic showed the best engagement in the top ten markets — 1,430 users at a 47% bounce rate, the lowest in the set.
The clinic now also surfaces in ChatGPT responses for “Cardiologists Singapore”, which is a useful secondary signal that the authority build is registering with the AI layer on top of traditional search.
The honest hedge: those 647 combined appointment and teleconsult clicks are CTA interactions, not confirmed bookings. Clinic-side CRM data sits outside our instrumentation. What the numbers do tell us is that commercial intent is now being captured in volume it wasn’t before, and the direction of travel on confirmed patient acquisition matches — which is why the engagement continues.
Why this kind of work matters
In commercial verticals like medical, legal, and professional services, the instinct to chase traffic volume is usually the wrong instinct. A site ranking for thousands of informational queries can look robust in an audit and still be commercially underperforming its weight class, because the keyword architecture isn’t aligned to the queries that drive revenue-bearing behaviour. Harley Street HVC is a cleaner example of this pattern than most — a DR 34 site being outranked on its highest-intent terms by DR 1.3 and DR 3.9 competitors — but the pattern itself is common.
Domain rating is a lagging signal of authority. It does not, on its own, decide commercial rankings. On-page alignment to the target query, backlinks acquired from topically relevant and editorially credible sources, and content depth on the specific keyword cluster — those are the inputs that move commercial rankings in verticals where the SERP is tightly contested and Google’s YMYL quality bar is applied. Getting those inputs right in the correct sequence is usually worth more than another ten points of DR earned from generic link activity.
If your business is in a commercial vertical, ranking for traffic that doesn’t convert, and you suspect the keyword architecture is the gap — contact us to discuss what a rework would look like for your specific SERP.